Coherent, Inc.

United States of America

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        Patent 318
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        United States 165
        World 150
        Canada 5
Date
2024 September 1
2024 July 1
2024 (YTD) 2
2023 6
2022 8
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IPC Class
H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range 34
H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms 32
G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for 30
H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media 29
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating 28
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Status
Pending 10
Registered / In Force 310
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1.

COMPOSITE FILTER FOR BLOCKING CARBON DIOXIDE LASER RADIATION

      
Application Number US2024020706
Publication Number 2024/197024
Status In Force
Filing Date 2024-03-20
Publication Date 2024-09-26
Owner COHERENT, INC. (USA)
Inventor Perilloux, Bruce

Abstract

A composite filter (100) includes a substrate (110) and, disposed thereon, a dielectric reststrahlen coating (120) and a dielectric coating stack (130). The substrate (110) is transmissive in a first infrared wavelength range from 9 to 11 micrometers as well as in neighboring infrared wavelength ranges above and below the first infrared wavelength range. The dielectric reststrahlen coating (120) has a reststrahlen band that overlaps with the first infrared wavelength range and contains at least one carbon dioxide laser wavelength, and is partly absorptive at the carbon dioxide wavelength(s). The dielectric coating stack (130) forms a multilayer interference filter that is predominantly reflective at the carbon dioxide laser wavelength(s) and predominantly transmissive in a second infrared wavelength range below the reststrahlen band.

IPC Classes  ?

2.

PYTHON

      
Application Number 234782900
Status Pending
Filing Date 2024-07-30
Owner Coherent, Inc. (USA)
NICE Classes  ? 09 - Scientific and electric apparatus and instruments

Goods & Services

(1) Lasers not for medical use.

3.

LASER FREQUENCY CONVERSION WITH ULTRAVIOLET-DAMAGE MITIGATION

      
Application Number US2022081934
Publication Number 2023/136961
Status In Force
Filing Date 2022-12-19
Publication Date 2023-07-20
Owner COHERENT, INC. (USA)
Inventor
  • Steinmetz, Alexander
  • Diening, Andreas
  • Wang, Charles Xiaoyi

Abstract

A laser frequency conversion system with ultraviolet-damage mitigation includes a nonlinear crystal for frequency converting a laser beam, and a one-dimensional beam expander arranged to receive the laser beam from the nonlinear crystal and expand a first transverse dimension of the laser beam. This expansion protects subsequent optical elements from ultraviolet damage. To mitigate ultraviolet damage to the nonlinear crystal and the beam expander, the system also includes one or more translation stages configured to translate the nonlinear crystal and the beam expander along a translation direction that is orthogonal to the first transverse dimension of the laser beam and non-parallel to a propagation direction of the laser beam through the nonlinear crystal and the beam expander.

IPC Classes  ?

4.

PULSE EQUALIZATION IN Q-SWITCHED GAS LASERS

      
Application Number US2022078772
Publication Number 2023/091849
Status In Force
Filing Date 2022-10-27
Publication Date 2023-05-25
Owner COHERENT, INC. (USA)
Inventor
  • Seguin, Vernon A.
  • Schmelzer, David P.
  • Fontanella, Joel
  • Rosenthal, Peter

Abstract

A Q-switched gas laser apparatus with bivariate pulse equalization includes a gas laser, a sensor, and an electronic circuit. A Q-switch that switches the laser resonator between high-loss and low-loss states to generate a pulsed laser beam. The sensor obtains a measurement of the pulsed laser beam indicative of the laser pulse energy. The electronic circuitry operates the Q-switch to (a) repeatedly switch the laser resonator between the high-loss and low-loss states to set a repetition rate of laser pulses of the pulsed laser beam, (b) adjust a loss level of the low-loss state, based on the pulse energy measurement, to achieve a target laser pulse energy, and (c) adjust a duration of the low-loss state to achieve a target laser pulse duration. By adjusting both pulse energy and duration, uniform pulse energy and, if desired, uniform pulse duration are achieved over a wide range of repetition rates.

IPC Classes  ?

  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/117 - Q-switching using intracavity acousto-optic devices
  • H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
  • H01S 3/136 - Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
  • H01S 3/106 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media

5.

PULSE EQUALIZATION IN Q-SWITCHED GAS LASERS

      
Application Number 17976642
Status Pending
Filing Date 2022-10-28
First Publication Date 2023-05-18
Owner Coherent, Inc. (USA)
Inventor
  • Seguin, Vernon
  • Schmelzer, David P.
  • Fontanella, Joel
  • Rosenthal, Peter

Abstract

A Q-switched gas laser apparatus with bivariate pulse equalization includes a gas laser, a sensor, and an electronic circuit. A Q-switch that switches the laser resonator between high-loss and low-loss states to generate a pulsed laser beam. The sensor obtains a measurement of the pulsed laser beam indicative of the laser pulse energy. The electronic circuitry operates the Q-switch to (a) repeatedly switch the laser resonator between the high-loss and low-loss states to set a repetition rate of laser pulses of the pulsed laser beam, (b) adjust a loss level of the low-loss state, based on the pulse energy measurement, to achieve a target laser pulse energy, and (c) adjust a duration of the low-loss state to achieve a target laser pulse duration. By adjusting both pulse energy and duration, uniform pulse energy and, if desired, uniform pulse duration are achieved over a wide range of repetition rates.

IPC Classes  ?

  • H01S 3/136 - Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
  • H01S 3/117 - Q-switching using intracavity acousto-optic devices
  • H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms

6.

ACTIVELY COOLED END-PUMPED SOLID-STATE LASER GAIN MEDIUM

      
Application Number 17853214
Status Pending
Filing Date 2022-06-29
First Publication Date 2023-01-26
Owner Coherent, Inc. (USA)
Inventor
  • Shu, Qize
  • Simanovski, Dmitri

Abstract

An actively cooled end-pumped solid-state laser gain device includes a bulk solid-state gain medium. An input-end of the gain medium receives a pump laser beam incident thereon and propagating in the direction toward an opposite output-end. The metal foil is disposed over a face of the gain medium extending between the input- and output-ends. A housing cooperates with the metal foil to form a coolant channel on the face the gain medium. The coolant channel has an inlet and an outlet configured to conduct a flow of coolant along the metal foil from the input-end towards the output-end. The metal foil is secured between the gain medium and portions of the housing running adjacent to the coolant channel. The metal foil provides a reliable thermal contact and imparts little or no stress on the bulk gain medium.

IPC Classes  ?

  • H01S 3/042 - Arrangements for thermal management for solid state lasers
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
  • H01S 3/04 - Arrangements for thermal management
  • H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

7.

ACTIVELY COOLED END-PUMPED SOLID-STATE LASER GAIN MEDIUM

      
Application Number US2022036514
Publication Number 2023/003705
Status In Force
Filing Date 2022-07-08
Publication Date 2023-01-26
Owner COHERENT, INC. (USA)
Inventor
  • Shu, Qize
  • Simanovski, Dmitri

Abstract

An actively cooled end-pumped solid-state laser gain device includes a bulk solid-state gain medium. An input-end of the gain medium receives a pump laser beam incident thereon and propagating in the direction toward an opposite output-end. The metal foil is disposed over a face of the gain medium extending between the input- and output-ends. A housing cooperates with the metal foil to form a coolant channel on the face the gain medium. The coolant channel has an inlet and an outlet configured to conduct a flow of coolant along the metal foil from the input-end towards the output-end. The metal foil is secured between the gain medium and portions of the housing running adjacent to the coolant channel. The metal foil provides a reliable thermal contact and imparts little or no stress on the bulk gain medium.

IPC Classes  ?

  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/042 - Arrangements for thermal management for solid state lasers
  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/02 - Constructional details
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode

8.

THERMALLY ACTUATED ADAPTIVE OPTICS

      
Application Number US2022029251
Publication Number 2023/278019
Status In Force
Filing Date 2022-05-13
Publication Date 2023-01-05
Owner COHERENT, INC. (USA)
Inventor
  • Hertwig, Michael
  • Murdoch, Keith, M.

Abstract

A thermally actuated adaptive optic includes a base, a reflector, and a plurality of actuators coupled therebetween. The reflector has a light-receiving front surface, and a back surface facing the base. Each actuator includes a bracket rigidly bonded to the reflector at a perimeter of the reflector, and an inner rod and. an outer rod. Each rod is rigidly connected between the bracket and the base, with the inner rod being closer to a center of the reflector. The length of each rod is temperature dependent. In another adaptive optic, the rods are instead bonded directly to the reflector. This adaptive optic may be modified to implement an integrally formed, thermally actuated support. The disclosed adaptive optics are suitable for use in laser systems, allow for significant cost savings over piezoelectric devices, provide a reflective area free of surface-figure perturbations caused by the actuator- interfaces, and are relatively simple to manufacture.

IPC Classes  ?

  • G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light

9.

Thermally actuated adaptive optics

      
Application Number 17360726
Grant Number 12055788
Status In Force
Filing Date 2021-06-28
First Publication Date 2022-12-29
Grant Date 2024-08-06
Owner Coherent, Inc. (USA)
Inventor
  • Hertwig, Michael
  • Murdoch, Keith M.

Abstract

A thermally actuated adaptive optic includes a base, a reflector, and a plurality of actuators coupled therebetween. The reflector has a light-receiving front surface, and a back surface facing the base. Each actuator includes a bracket rigidly bonded to the reflector at a perimeter of the reflector, and an inner rod and an outer rod. Each rod is rigidly connected between the bracket and the base, with the inner rod being closer to a center of the reflector. The length of each rod is temperature dependent. In another adaptive optic, the rods are instead bonded directly to the reflector. This adaptive optic may be modified to implement an integrally formed, thermally actuated support. The disclosed adaptive optics are suitable for use in laser systems, allow for significant cost savings over piezoelectric devices, provide a reflective area free of surface-figure perturbations caused by the actuator-interfaces, and are relatively simple to manufacture.

IPC Classes  ?

  • G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
  • G02B 7/18 - Mountings, adjusting means, or light-tight connections, for optical elements for mirrors

10.

OPTOMECHANICAL ASSEMBLIES FOR TEMPERATURE-ROBUST LASER BEAM COMBINATION AND DELIVERY

      
Application Number US2021065673
Publication Number 2022/164567
Status In Force
Filing Date 2021-12-30
Publication Date 2022-08-04
Owner COHERENT, INC. (USA)
Inventor
  • Czopek, Bradley
  • Simmons, Cameron

Abstract

An optomechanical assembly (100) for temperature-robust laser beam processing includes a baseplate (110) and an optics plate (130). The baseplate includes a source area (112) for accommodating a source (160) of the laser beam, and a light-processing area (114) located away from the source area and including first (116) and second anchor points (118). The optics plate is disposed in the light¬ processing area and includes first (132) and second portions (134) and a flexible coupling (136) interconnecting the first and second portions. The first and second portions are fixed to the baseplate at the first and second anchor points, respectively. The flexible coupling allows for a thermally-induced change in distance between the first and second anchor points in the presence of dissimilar thermal expansion of the optics plate and the baseplate. The assembly further includes a linearly arranged series of optical elements (142) for manipulating a laser beam from the laser source. Each of the optical elements is rigidly bonded to the first portion (132). The coefficient of thermal expansion (CTE) of the optics plate (130) is matched to the CTEs of the optical elements (142).

IPC Classes  ?

  • G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
  • H01S 5/02325 - Mechanically integrated components on mount members or optical micro-benches

11.

OPTOMECHANICAL ASSEMBLIES FOR TEMPERATURE-ROBUST LASER BEAM COMBINATION AND DELIVERY

      
Application Number 17580325
Status Pending
Filing Date 2022-01-20
First Publication Date 2022-08-04
Owner Coherent, Inc. (USA)
Inventor
  • Czopek, Bradley
  • Simmons, Cameron

Abstract

An optomechanical assembly for temperature-robust laser beam processing includes a baseplate and an optics plate. The baseplate includes a source area for accommodating a source of the laser beam, and a light-processing area located away from the source area and including first and second anchor points. The optics plate is disposed in the light-processing area and includes first and second portions and a flexible coupling interconnecting the first and second portions. The first and second portions are fixed to the baseplate at the first and second anchor points, respectively. The flexible coupling allows for a thermally-induced change in distance between the first and second anchor points in the presence of dissimilar thermal expansion of the optics plate and the baseplate. The assembly further includes a series of optical elements for manipulating a laser beam from the laser source. Each of the optical elements is rigidly bonded to the first portion.

IPC Classes  ?

  • B23K 26/064 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
  • G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing

12.

SPECTRALLY BROADENING ULTRASHORT-PULSE COMPRESSOR

      
Application Number US2021065583
Publication Number 2022/154967
Status In Force
Filing Date 2021-12-29
Publication Date 2022-07-21
Owner COHERENT, INC. (USA)
Inventor
  • Hartmann, Nick
  • Hertwig, Michael

Abstract

An ultrashort-pulse compressor includes (a) one or more bulk-optics intersecting a propagation path of an ultrashort-pulsed laser beam multiple times to spectrally broaden a pulse of the laser beam during each of multiple passes through the bulk-optic(s), (b) one or more dispersive optics for compressing a duration of the pulse after each of the multiple passes, and (c) a plurality of focusing elements for focusing the laser beam between the multiple passes. Propagation distances between the bulk-optic(s) and the focusing elements are detuned from imaging such that a spot size of the laser beam, at the bulk-optic(s), is greater at each successive one of the multiple passes. As the laser beam propagates through this compressor, each laser pulse is alternatingly spectral broadened and temporally compressed. The increasing spot size of the laser, for each pass, helps prevent optical damage, run- away self-focusing, and other undesirable outcomes.

IPC Classes  ?

  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range

13.

SPECTRALLY BROADENING ULTRASHORT-PULSE COMPRESSOR

      
Application Number 17148521
Status Pending
Filing Date 2021-01-13
First Publication Date 2022-07-14
Owner Coherent, Inc. (USA)
Inventor
  • Hartmann, Nick
  • Hertwig, Michael

Abstract

An ultrashort-pulse compressor includes (a) one or more bulk-optics intersecting a propagation path of an ultrashort-pulsed laser beam multiple times to spectrally broaden a pulse of the laser beam during each of multiple passes through the bulk-optic(s), (b) one or more dispersive optics for compressing a duration of the pulse after each of the multiple passes, and (c) a plurality of focusing elements for focusing the laser beam between the multiple passes. Propagation distances between the bulk-optic(s) and the focusing elements are detuned from imaging such that a spot size of the laser beam, at the bulk-optic(s), is greater at each successive one of the multiple passes. As the laser beam propagates through this compressor, each laser pulse is alternatingly spectral broadened and temporally compressed. The increasing spot size of the laser, for each pass, helps prevent optical damage, run-away self-focusing, and other undesirable outcomes.

IPC Classes  ?

  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/046 - Automatically focusing the laser beam

14.

PYTHON

      
Application Number 1664394
Status Registered
Filing Date 2022-05-06
Registration Date 2022-05-06
Owner Coherent, Inc. (USA)
NICE Classes  ? 09 - Scientific and electric apparatus and instruments

Goods & Services

Lasers not for medical use.

15.

Pulsed laser with intracavity frequency conversion aided by extra-cavity frequency conversion

      
Application Number 16994431
Grant Number 11394169
Status In Force
Filing Date 2020-08-14
First Publication Date 2022-02-17
Grant Date 2022-07-19
Owner Coherent, Inc. (USA)
Inventor Shu, Qize

Abstract

A pulsed third-harmonic laser system includes a pulsed laser, an extra-cavity nonlinear crystal, and an intracavity nonlinear crystal. The pulsed laser generates fundamental laser pulses and couples out a portion of each fundamental laser pulse out of the laser resonator to undergo second-harmonic-generation in the extra-cavity nonlinear crystal. Resulting second-harmonic laser pulses are directed back into the laser resonator and mixes with the fundamental laser pulses in the intracavity nonlinear crystal to generate third-harmonic laser pulses. The pulsed third-harmonic laser system thus maintains a non-zero output coupling efficiency regardless of the efficiency of the second-harmonic-generation stage, while the third-harmonic-generation stage benefits from the intracavity power of the fundamental laser pulses.

IPC Classes  ?

  • G02F 1/37 - Non-linear optics for second-harmonic generation
  • H01S 3/109 - Frequency multiplication, e.g. harmonic generation
  • G02F 1/35 - Non-linear optics
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
  • H01S 3/108 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering

16.

PULSED LASER WITH INTRACAVITY FREQUENCY CONVERSION AIDED BY EXTRA-CAVITY FREQUENCY CONVERSION

      
Application Number US2021044530
Publication Number 2022/035660
Status In Force
Filing Date 2021-08-04
Publication Date 2022-02-17
Owner COHERENT, INC. (USA)
Inventor Shu, Qize

Abstract

A pulsed third-harmonic laser system includes a pulsed laser, an extra-cavity nonlinear crystal, and an intracavity nonlinear crystal. The pulsed laser generates fundamental laser pulses and couples out a portion of each fundamental laser pulse out of the laser resonator to undergo second-harmonic-generation in the extra-cavity nonlinear crystal. Resulting second-harmonic laser pulses are directed back into the laser resonator and mixes with the fundamental laser pulses in the intracavity nonlinear crystal to generate third-harmonic laser pulses. The pulsed third-harmonic laser system thus maintains a non-zero output coupling efficiency regardless of the efficiency of the second-harmonic-generation stage, while the third-harmonic-generation stage benefits from the intracavity power of the fundamental laser pulses.

IPC Classes  ?

  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/109 - Frequency multiplication, e.g. harmonic generation
  • H01S 3/108 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
  • H01S 3/115 - Q-switching using intracavity electro-optic devices
  • H01S 3/08 - Construction or shape of optical resonators or components thereof

17.

Laser welding method

      
Application Number 16881886
Grant Number 11524361
Status In Force
Filing Date 2020-05-22
First Publication Date 2021-11-25
Grant Date 2022-12-13
Owner Coherent, Inc. (USA)
Inventor Brescoe, Ryan

Abstract

A method for laser keyhole welding is disclosed to weld two pieces together made of a metal alloy. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power of the annular beam is reduced, motion of the focused beams is stopped, the power of the center beam is increased, and the power of both beams is initially ramped down rapidly and then ramped down slowly. Increasing the power of the center beam equalizes the temperature of both pieces prior to solidification and cooling at the termination of the weld. An additional pulse of power may be applied to prevent the formation of defects or to erase any defects.

IPC Classes  ?

  • B23K 26/244 - Overlap seam welding
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/073 - Shaping the laser spot
  • B23K 103/04 - Steel alloys

18.

LASER WELDING METHOD

      
Application Number US2021031057
Publication Number 2021/236337
Status In Force
Filing Date 2021-05-06
Publication Date 2021-11-25
Owner COHERENT, INC. (USA)
Inventor Brescoe, Ryan

Abstract

A method for laser keyhole welding is disclosed to weld two pieces together made of a metal alloy. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power of the annular beam (PA) is reduced, motion of the focused beams is stopped, the power of the center beam (Pc) is increased, and the power of both beams is initially ramped down rapidly and then ramped down slowly. Increasing the power of the center beam equalizes the temperature of both pieces prior to solidification and cooling at the termination of the weld. An additional pulse of power may be applied to prevent the formation of defects or to erase any defects.

IPC Classes  ?

19.

LASER WELDING METHOD

      
Document Number 03178403
Status Pending
Filing Date 2021-05-06
Open to Public Date 2021-11-25
Owner COHERENT, INC. (USA)
Inventor Brescoe, Ryan

Abstract

A method for laser keyhole welding is disclosed to weld two pieces together made of a metal alloy. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power of the annular beam (PA) is reduced, motion of the focused beams is stopped, the power of the center beam (Pc) is increased, and the power of both beams is initially ramped down rapidly and then ramped down slowly. Increasing the power of the center beam equalizes the temperature of both pieces prior to solidification and cooling at the termination of the weld. An additional pulse of power may be applied to prevent the formation of defects or to erase any defects.

IPC Classes  ?

20.

RADIO-FREQUENCY EXCITED GAS LASER

      
Application Number US2021015120
Publication Number 2021/158396
Status In Force
Filing Date 2021-01-26
Publication Date 2021-08-12
Owner COHERENT, INC. (USA)
Inventor
  • Newman, Leon A.
  • Ermold, Michael Leigh
  • Hyland, James
  • Hennessey, Thomas V., Jr.
  • Laughman, Lanny

Abstract

22) or carbon monoxide (CO) gas laser includes two electrodes, which have passivated surfaces, within a sealed housing. Features in a ceramic slab or a ceramic cylinder located between the electrodes define a gain volume. Surfaces of the ceramic slab or the ceramic cylinder are separated from the passivated surfaces of the electrodes by small gaps to prevent abrasion thereof. Reducing compressive forces that secure these components within the housing further reduces abrasion, thereby extending the operational lifetime of the gas laser.

IPC Classes  ?

  • H01S 3/032 - Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube
  • H01S 3/038 - Electrodes, e.g. special shape, configuration or composition
  • H01S 3/0971 - Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser transversely excited
  • H01S 3/07 - Construction or shape of active medium consisting of a plurality of parts, e.g. segments
  • H01S 3/081 - Construction or shape of optical resonators or components thereof comprising three or more reflectors
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/03 - Constructional details of gas laser discharge tubes

21.

Radio-frequency excited gas laser

      
Application Number 17161464
Grant Number 11848530
Status In Force
Filing Date 2021-01-28
First Publication Date 2021-08-05
Grant Date 2023-12-19
Owner Coherent, Inc. (USA)
Inventor
  • Newman, Leon A.
  • Ermold, Michael Leigh
  • Hyland, James
  • Hennessey, Jr., Thomas V.
  • Laughman, Lanny

Abstract

2) or carbon monoxide (CO) gas laser includes two electrodes, which have passivated surfaces, within a sealed housing. Features in a ceramic slab or a ceramic cylinder located between the electrodes define a gain volume. Surfaces of the ceramic slab or the ceramic cylinder are separated from the passivated surfaces of the electrodes by small gaps to prevent abrasion thereof. Reducing compressive forces that secure these components within the housing further reduces abrasion, thereby extending the operational lifetime of the gas laser.

IPC Classes  ?

  • H01S 3/03 - Constructional details of gas laser discharge tubes
  • H01S 3/038 - Electrodes, e.g. special shape, configuration or composition
  • H01S 3/097 - Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms

22.

Optical parametric chirped-pulse amplifier

      
Application Number 16546178
Grant Number 11404841
Status In Force
Filing Date 2019-08-20
First Publication Date 2021-02-25
Grant Date 2022-08-02
Owner Coherent, Inc. (USA)
Inventor
  • Simanovski, Dmitri
  • Hodgson, Norman

Abstract

An optical parametric chirped-pulse amplifier includes first and second optical parametric amplifier stages that successively amplify a stretched signal beam. A pulsed laser provides a fundamental beam. The second amplifier stage is pumped by the full power of a second-harmonic beam that is generated from the fundamental beam. A residual fundamental beam is used to generate another second-harmonic beam that pumps the first amplifier stage.

IPC Classes  ?

  • H01S 3/091 - Processes or apparatus for excitation, e.g. pumping using optical pumping
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves
  • H01S 3/067 - Fibre lasers
  • H01S 3/16 - Solid materials

23.

OPTICAL PARAMETRIC CHIRPED-PULSE AMPLIFIER

      
Application Number US2020045648
Publication Number 2021/034531
Status In Force
Filing Date 2020-08-10
Publication Date 2021-02-25
Owner COHERENT, INC. (USA)
Inventor
  • Simanovski, Dmitri
  • Hodgson, Norman

Abstract

An optical parametric chirped-pulse amplifier includes first and second optical parametric amplifier stages that successively amplify a stretched signal beam. A pulsed laser provides a fundamental beam. The second amplifier stage is pumped by the full power of a second-harmonic beam that is generated from the fundamental beam. A residual fundamental beam is used to generate another second-harmonic beam that pumps the first amplifier stage.

IPC Classes  ?

  • G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves

24.

Laser wavelength stabilization apparatus

      
Application Number 16518689
Grant Number 11283237
Status In Force
Filing Date 2019-07-22
First Publication Date 2021-01-28
Grant Date 2022-03-22
Owner Coherent, Inc. (USA)
Inventor Shu, Qize

Abstract

A wavelength sensor for wavelength stabilization of a laser beam includes an etalon placed in the laser beam and tilted with respect to the laser beam. Reflected beams from the etalon form an interference pattern on a segmented photodetector having two detector segments. Output signals from the two detector segments are used to derive an error signal for a closed control loop to effect the wavelength stabilization.

IPC Classes  ?

  • H01S 5/0683 - Stabilisation of laser output parameters by monitoring the optical output parameters
  • G01J 9/02 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods

25.

LASER WAVELENGTH STABILIZATION APPARATUS

      
Application Number US2020042011
Publication Number 2021/016004
Status In Force
Filing Date 2020-07-14
Publication Date 2021-01-28
Owner COHERENT, INC. (USA)
Inventor Shu, Qize

Abstract

A wavelength sensor for wavelength stabilization of a laser beam includes an etalon placed in the laser beam and tilted with respect to the laser beam. Reflected beams from the etalon form an interference pattern on a segmented photodetector having two detector segments. Output signals from the two detector segments are used to derive an error signal for a closed control loop to effect the wavelength stabilization.

IPC Classes  ?

  • H01S 5/00 - Semiconductor lasers
  • H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
  • H01S 5/065 - Mode locking; Mode suppression; Mode selection
  • H01S 5/0687 - Stabilising the frequency of the laser
  • H01S 3/137 - Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency
  • H01S 3/139 - Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity
  • H01S 3/08 - Construction or shape of optical resonators or components thereof

26.

High repetition rate seed laser

      
Application Number 16434080
Grant Number 11152757
Status In Force
Filing Date 2019-06-06
First Publication Date 2020-12-10
Grant Date 2021-10-19
Owner Coherent, Inc. (USA)
Inventor
  • Hodgson, Norman
  • Simanovski, Dmitri

Abstract

A fiber laser producing a beam of ultrashort laser pulses at a repetition rate greater than 200 MHz includes a linear fiber resonator and a fiber branch. Ultrashort laser pulses are generated by passive mode-locking and circulate within the linear fiber resonator. Each circulating laser pulse is split into a portion that continues propagating in the linear fiber resonator and a complementary portion that propagates through the fiber branch and is then returned to the linear fiber resonator. The optical length of the linear fiber resonator is an integer multiple of the optical length of the fiber branch. The repetition rate of the ultrashort laser pulses is the reciprocal of the propagation time of the laser pulses through the fiber branch.

IPC Classes  ?

  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
  • H01S 3/067 - Fibre lasers
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
  • H01S 3/1055 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity one of the reflectors being constituted by a diffraction grating

27.

SINGLE CRYSTAL OPTICAL PARAMETRIC AMPLIFIER

      
Application Number US2020029885
Publication Number 2020/226912
Status In Force
Filing Date 2020-04-24
Publication Date 2020-11-12
Owner COHERENT, INC. (USA)
Inventor
  • Simanovski, Dmitri
  • Starodoumov, Andrei
  • Hodgson, Norman

Abstract

An apparatus for generating visible light including a laser source emitting a fundamental beam, an optically nonlinear crystal, and a seed source emitting a seed beam. The optically nonlinear crystal receives the fundamental beam. The fundamental beam propagates in the nonlinear crystal at a first phase-matching angle for second-harmonic generation. A portion of the fundamental beam is converted into a second-harmonic beam that propagates in the nonlinear crystal at the first phase-matching angle for optical parametric generation. The seed source emits a seed beam having a wavelength longer than the second-harmonic beam. The seed beam is directed into the nonlinear crystal and propagates at a second phase-matching angle for the optical parametric amplification. A portion of the second-harmonic beam is converted into a signal beam at the seed wavelength and an idler beam by the optical parametric amplification.

IPC Classes  ?

28.

Beam forming with focus location adjustment

      
Application Number 16393545
Grant Number 11169386
Status In Force
Filing Date 2019-04-24
First Publication Date 2020-10-29
Grant Date 2021-11-09
Owner Coherent, Inc. (USA)
Inventor
  • Meng, Lei
  • Winz, Michele Wayne

Abstract

An apparatus includes a beam source, beam forming optics, a first focusing lens having a focal length, a second focusing lens having a focal length similar to the focal length of the first lens, and a lens translator configured to move the second lens transversely relative to the beam forming optics and to the first lens, and thereby move the elongated focus transversely. In some embodiments, the beam forming optics are positioned between the beam source and the first focusing lens, the first focusing lens is positioned between the beam forming optics and the second focusing lens, and the beam forming optics, the first focusing lens, and the second focusing lens are arranged to receive a beam of laser radiation from the beam source and to form the beam into an elongated focus.

IPC Classes  ?

  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/16 - Beam splitting or combining systems used as aids for focusing

29.

BEAM FORMING WITH FOCUS LOCATION ADJUSTMENT

      
Application Number US2020027064
Publication Number 2020/219263
Status In Force
Filing Date 2020-04-07
Publication Date 2020-10-29
Owner COHERENT, INC. (USA)
Inventor
  • Meng, Lei
  • Winz, Michele Wayne

Abstract

An apparatus includes a beam source, beam forming optics, a first focusing lens having a focal length, a second focusing lens having a focal length similar to the focal length of the first lens, and a lens translator configured to move the second lens transversely relative to the beam forming optics and to the first lens, and thereby move the elongated focus transversely. In some embodiments, the beam forming optics are positioned between the beam source and the first focusing lens, the first focusing lens is positioned between the beam forming optics and the second focusing lens, and the beam forming optics, the first focusing lens, and the second focusing lens are arranged to receive a beam of laser radiation from the beam source and to form the beam into an elongated focus.

IPC Classes  ?

  • G01N 15/14 - Electro-optical investigation
  • G01N 21/64 - Fluorescence; Phosphorescence
  • G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/073 - Shaping the laser spot

30.

LASER WELDING METHOD

      
Application Number US2020017085
Publication Number 2020/167588
Status In Force
Filing Date 2020-02-06
Publication Date 2020-08-20
Owner COHERENT, INC. (USA)
Inventor
  • Brescoe, Ryan
  • Lavoie, Jean-Philippe

Abstract

A method for laser keyhole welding of metal alloys is disclosed. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power in the center beam is initially ramped up and then ramped down, while the power in the annular beam is ramped down. Increasing the power in the center beam enables a controlled and prolonged contraction of the keyhole and melt pool, thereby preventing undesirable cracking.

IPC Classes  ?

31.

LASER WELDING METHOD

      
Document Number 03127831
Status Pending
Filing Date 2020-02-06
Open to Public Date 2020-08-20
Owner COHERENT, INC. (USA)
Inventor
  • Brescoe, Ryan
  • Lavoie, Jean-Philippe

Abstract

A method for laser keyhole welding of metal alloys is disclosed. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power in the center beam is initially ramped up and then ramped down, while the power in the annular beam is ramped down. Increasing the power in the center beam enables a controlled and prolonged contraction of the keyhole and melt pool, thereby preventing undesirable cracking.

IPC Classes  ?

32.

Laser apparatus for cutting brittle material

      
Application Number 16860300
Grant Number 11548093
Status In Force
Filing Date 2020-04-28
First Publication Date 2020-08-13
Grant Date 2023-01-10
Owner Coherent, Inc. (USA)
Inventor
  • Greenberg, Michael R.
  • Gaudiosi, David M.
  • Deile, Jochen

Abstract

An apparatus for cutting brittle material comprises an aspheric focusing lens, an aperture, and a laser-source generating a beam of pulsed laser-radiation. The aspheric lens and the aperture form the beam of pulsed laser-radiation into an elongated focus having a uniform intensity distribution along the optical axis of the aspheric focusing lens. The elongated focus extends through the full thickness of a workpiece made of a brittle material. The workpiece is cut by tracing the optical axis along a cutting line. Each pulse or burst of pulsed laser-radiation creates an extended defect through the full thickness of the workpiece.

IPC Classes  ?

  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/073 - Shaping the laser spot
  • B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
  • B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
  • B23K 26/066 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/08 - Devices involving relative movement between laser beam and workpiece
  • B23K 26/402 - Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
  • C03B 33/02 - Cutting or splitting sheet glass; Apparatus or machines therefor
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/30 - Collimators
  • B23K 103/00 - Materials to be soldered, welded or cut

33.

Laser welding method

      
Application Number 16786623
Grant Number 11389894
Status In Force
Filing Date 2020-02-10
First Publication Date 2020-08-13
Grant Date 2022-07-19
Owner Coherent, Inc. (USA)
Inventor
  • Brescoe, Ryan
  • Lavoie, Jean-Philippe

Abstract

A method for laser keyhole welding of metal alloys is disclosed. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power in the center beam is initially ramped up and then ramped down, while the power in the annular beam is ramped down. Increasing the power in the center beam enables a controlled and prolonged contraction of the keyhole and melt pool, thereby preventing undesirable cracking.

IPC Classes  ?

34.

DIODE-PUMPED SOLID-STATE LASER APPARATUS FOR LASER ANNEALING

      
Application Number US2020013551
Publication Number 2020/154136
Status In Force
Filing Date 2020-01-14
Publication Date 2020-07-30
Owner COHERENT, INC. (USA)
Inventor
  • Hodgson, Norman
  • Caprara, Andrea
  • Schmidt, Kai

Abstract

Laser annealing apparatus includes a plurality of frequency- tripled solid-state lasers, each delivering an output beam of radiation at a wavelength between 340 nm and 360 nm. Each output beam has a beam-quality factor (M2) greater of than 50 in one transverse axis and greater than 20 in another transverse axis. The output beams are combined and formed into a line-beam that is projected on a substrate being annealed. Each output beam contributes to the length of the line-beam.

IPC Classes  ?

  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range

35.

Conductively-cooled slab laser

      
Application Number 16838564
Grant Number 11336070
Status In Force
Filing Date 2020-04-02
First Publication Date 2020-07-23
Grant Date 2022-05-17
Owner Coherent, Inc. (USA)
Inventor
  • Mueller, Eric R.
  • Seguin, Vernon A.
  • Shackleton, Christian

Abstract

A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include fluid coolant channels. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.

IPC Classes  ?

  • H01S 3/041 - Arrangements for thermal management for gas lasers
  • H01S 3/038 - Electrodes, e.g. special shape, configuration or composition
  • H01S 3/03 - Constructional details of gas laser discharge tubes
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/04 - Arrangements for thermal management

36.

DIODE-PUMPED SOLID-STATE LASER APPARATUS FOR LASER ANNEALING

      
Application Number 16741486
Status Pending
Filing Date 2020-01-13
First Publication Date 2020-07-23
Owner Coherent, Inc. (USA)
Inventor
  • Hodgson, Norman
  • Caprara, Andrea
  • Schmidt, Kai

Abstract

Laser annealing apparatus includes a plurality of frequency-tripled solid-state lasers, each delivering an output beam of radiation at a wavelength between 340 nm and 360 nm. Each output beam has a beam-quality factor (M2) greater of than 50 in one transverse axis and greater than 20 in another transverse axis. The output beams are combined and formed into a line-beam that is projected on a substrate being annealed. Each output beam contributes to the length of the line-beam.

IPC Classes  ?

  • H01S 3/109 - Frequency multiplication, e.g. harmonic generation
  • H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
  • H01S 3/16 - Solid materials
  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/115 - Q-switching using intracavity electro-optic devices
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/064 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
  • B23K 26/354 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
  • B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring

37.

HIGH-RADIANCE WAVELENGTH-AGILE INCOHERENT LIGHT-SOURCE

      
Application Number US2019065518
Publication Number 2020/123533
Status In Force
Filing Date 2019-12-10
Publication Date 2020-06-18
Owner COHERENT, INC. (USA)
Inventor
  • Govorkov, Sergei V.
  • Jerman, John H.

Abstract

A source of high-radiance broad-band incoherent light includes an optical waveguide, having a core made of phosphor granules embedded in a matrix of glass and a cladding. The core having a relatively high refractive index and the cladding having a relatively low refractive index. The phosphor granules and the glass matrix having about the same refractive index. Radiation from one or more diode-lasers is injected into one end of the waveguide to energize the phosphor granules, producing broad-band incoherent light, which is confined and guided to an opposite end of the waveguide as output light.

IPC Classes  ?

  • F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

38.

Laser power and energy sensor utilizing anisotropic thermoelectric material

      
Application Number 15147816
Grant Number RE048028
Status In Force
Filing Date 2016-05-05
First Publication Date 2020-06-02
Grant Date 2020-06-02
Owner Coherent, Inc. (USA)
Inventor
  • Semerad, Robert
  • Krous, Erik
  • Schloss, James

Abstract

A laser-radiation sensor includes a copper substrate on which is grown an oriented polycrystalline buffer layer surmounted by an oriented polycrystalline sensor-element of an anisotropic transverse thermoelectric material. An absorber layer, thermally connected to the sensor-element, is heated by laser-radiation to be measured and communicates the heat to the sensor-element, causing a thermal gradient across the sensor-element. Spaced-apart electrodes in electrical contact with the sensor-element sense a voltage corresponding to the thermal gradient as a measure of the incident laser-radiation power.

IPC Classes  ?

  • G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
  • G01K 17/00 - Measuring quantity of heat
  • G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
  • H01L 31/0368 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including polycrystalline semiconductors
  • G01J 5/12 - Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
  • G01J 5/04 - Casings

39.

Single Crystal optical parametric amplifier

      
Application Number 16408289
Grant Number 10642127
Status In Force
Filing Date 2019-05-09
First Publication Date 2020-05-05
Grant Date 2020-05-05
Owner Coherent, Inc. (USA)
Inventor
  • Simanovski, Dmitri
  • Starodoumov, Andrei
  • Hodgson, Norman

Abstract

An apparatus for generating visible light including a laser source emitting a fundamental beam, an optically nonlinear crystal, and a seed source emitting a seed beam. The optically nonlinear crystal receives the fundamental beam. The fundamental beam propagates in the nonlinear crystal at a first phase-matching angle for second-harmonic generation. A portion of the fundamental beam is converted into a second-harmonic beam that propagates in the nonlinear crystal at the first phase-matching angle for optical parametric generation. The seed source emits a seed beam having a wavelength longer than the second-harmonic beam. The seed beam is directed into the nonlinear crystal and propagates at a second phase-matching angle for the optical parametric amplification. A portion of the second-harmonic beam is converted into a signal beam at the seed wavelength and an idler beam by the optical parametric amplification.

IPC Classes  ?

  • G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves
  • G02F 1/355 - Non-linear optics characterised by the materials used
  • G02F 1/37 - Non-linear optics for second-harmonic generation

40.

Third-harmonic generating apparatus for laser-radiation having polarization loop

      
Application Number 16172018
Grant Number 10983260
Status In Force
Filing Date 2018-10-26
First Publication Date 2020-04-30
Grant Date 2021-04-20
Owner Coherent, Inc. (USA)
Inventor Caprara, Andrea

Abstract

A third-harmonic conversion arrangement includes a second-harmonic generating crystal and a third-harmonic generating crystal arranged in a polarization loop. The polarization loop, which includes a plurality of mirrors, a polarization-selective reflector, and a polarization rotator, causes plane-polarized fundamental-wavelength radiation being converted to make two passes through the crystals in orthogonally-opposed polarization orientations.

IPC Classes  ?

  • G02B 5/08 - Mirrors
  • G02B 5/30 - Polarising elements
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping

41.

THIRD-HARMONIC GENERATING APPARATUS FOR LASER-RADIATION

      
Application Number US2019055243
Publication Number 2020/086262
Status In Force
Filing Date 2019-10-08
Publication Date 2020-04-30
Owner COHERENT, INC. (USA)
Inventor Caprara, Andrea

Abstract

A third-harmonic conversion arrangement includes a second-harmonic generating crystal and a third-harmonic generating crystal arranged in a polarization loop. The polarization loop causes plane-polarized fundamental-wavelength radiation being converted to make two passes through the crystals in orthogonally-opposed polarization orientations.

IPC Classes  ?

42.

LASER-MOPA WITH BURST-MODE CONTROL

      
Application Number US2019037671
Publication Number 2019/246053
Status In Force
Filing Date 2019-06-18
Publication Date 2019-12-26
Owner COHERENT, INC. (USA)
Inventor Dumond, Gregory

Abstract

A laser master-oscillator power-amplifier (MOPA) is operated to provide successive bursts of ultrashort pulses. The pulse-bursts are selected by an optical modulator from a pulse train delivered by the master oscillator prior to amplification in the power amplifier. The optical modulator has a selectively variable transmission specified by an analog voltage signal having a stepped waveform. The voltage signal is delivered by a sequentially-switched parallel switch-array connected in parallel with a parallel DAC having multiple parallel DC voltage outputs corresponding to steps of the stepped waveform.

IPC Classes  ?

  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/067 - Fibre lasers
  • H01S 5/062 - Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes

43.

Laser-MOPA with burst-mode control

      
Application Number 16011310
Grant Number 11081855
Status In Force
Filing Date 2018-06-18
First Publication Date 2019-12-19
Grant Date 2021-08-03
Owner Coherent, Inc. (USA)
Inventor Dumond, Gregory

Abstract

A laser master-oscillator power-amplifier (MOPA) is operated to provide successive bursts of ultrashort pulses. The pulse-bursts are selected by an optical modulator from a pulse train delivered by the master oscillator prior to amplification in the power amplifier. The optical modulator has a selectively variable transmission specified by an analog voltage signal having a stepped waveform. The voltage signal is delivered by a sequentially-switched parallel switch-array connected in parallel with a parallel DAC having multiple parallel DC voltage outputs corresponding to steps of the stepped waveform.

IPC Classes  ?

  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/067 - Fibre lasers
  • H01S 3/106 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
  • H01S 5/065 - Mode locking; Mode suppression; Mode selection
  • H03M 1/74 - Simultaneous conversion

44.

Conductively-cooled slab laser

      
Application Number 15914343
Grant Number 10644474
Status In Force
Filing Date 2018-03-07
First Publication Date 2019-09-12
Grant Date 2020-05-05
Owner Coherent, Inc. (USA)
Inventor
  • Mueller, Eric R.
  • Seguin, Vernon A.
  • Shackleton, Christian

Abstract

A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include any direct fluid-cooling means. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.

IPC Classes  ?

  • H01S 3/041 - Arrangements for thermal management for gas lasers
  • H01S 3/038 - Electrodes, e.g. special shape, configuration or composition
  • H01S 3/03 - Constructional details of gas laser discharge tubes
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/04 - Arrangements for thermal management

45.

CONDUCTIVELY-COOLED SLAB LASER

      
Application Number US2019020375
Publication Number 2019/173157
Status In Force
Filing Date 2019-03-01
Publication Date 2019-09-12
Owner COHERENT, INC. (USA)
Inventor
  • Mueller, Eric R.
  • Seguin, Vernon A.
  • Shackleton, Christian

Abstract

A carbon dioxide gas-discharge slab-laser is assembled in a laser-housing. The laser-housing is formed from a hollow extrusion. An interior surface of the extrusion provides a ground electrode of the laser. Another live electrode is located within the extrusion, electrically insulated from and parallel to the ground electrode, forming a discharge-gap of the slab-laser. The electrodes are spaced apart by parallel ceramic strips. Neither the extrusion, nor the live electrode, include any direct fluid-cooling means. The laser-housing is cooled by fluid-cooled plates attached to the outside thereof.

IPC Classes  ?

  • H01S 3/03 - Constructional details of gas laser discharge tubes
  • H01S 3/038 - Electrodes, e.g. special shape, configuration or composition
  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/041 - Arrangements for thermal management for gas lasers

46.

Method for laser-marking of anodized aluminum

      
Application Number 15052687
Grant Number 10391586
Status In Force
Filing Date 2016-02-24
First Publication Date 2019-08-27
Grant Date 2019-08-27
Owner Coherent, Inc. (USA)
Inventor
  • Rea, Jr., Edward C.
  • Haloui, Hatim

Abstract

An aluminum covered with an anodically formed aluminum oxide layer is marked by repeated bursts of two or more individual laser pulses. The intensity of the individual pulses in the bursts is kept below a level experimentally determined to compromise the integrity of the aluminum oxide layer. The collective fluence in a burst is sufficient to mark the aluminum, but not sufficient to compromise the integrity of the oxide layer.

IPC Classes  ?

  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/356 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
  • B23K 26/359 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line

47.

ACHROMATIC ASTIGMATIC ANAMORPHIC OBJECTIVE

      
Application Number US2019013320
Publication Number 2019/152171
Status In Force
Filing Date 2019-01-11
Publication Date 2019-08-08
Owner COHERENT, INC. (USA)
Inventor
  • Winz, Michele Wayne
  • Meng, Lei

Abstract

An anamorphic three-element objective lens projects a plurality of beams of different wavelengths and different diameters into an elongated focal spot in a working- plane. In one transverse direction of the lens, the beams are tightly focused with equal beam-waist widths in the working-plane, defining a height of the focal spot. In another transverse direction, the different beams are focused progressively beyond the working- plane such that the beams have a common beam-width in the working-plane, thereby defining a width of the focal spot.

IPC Classes  ?

  • G02B 9/16 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only arranged + – + all the components being simple
  • G02B 13/00 - Optical objectives specially designed for the purposes specified below
  • G02B 13/08 - Anamorphotic objectives
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/10 - Beam splitting or combining systems
  • G02B 27/14 - Beam splitting or combining systems operating by reflection only
  • G01N 15/14 - Electro-optical investigation
  • A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

48.

Achromatic astigmatic anamorphic objective

      
Application Number 15883542
Grant Number 10663700
Status In Force
Filing Date 2018-01-30
First Publication Date 2019-08-01
Grant Date 2020-05-26
Owner Coherent, Inc. (USA)
Inventor
  • Winz, Michele Wayne
  • Meng, Lei

Abstract

An anamorphic three-element objective lens projects a plurality of beams of different wavelengths and different diameters into an elongated focal spot in a working-plane. In one transverse direction of the lens, the beams are tightly focused with equal beam-waist widths in the working-plane, defining a height of the focal spot. In another transverse direction, the different beams are focused progressively beyond the working-plane such that the beams have a common beam-width in the working-plane, thereby defining a width of the focal spot.

IPC Classes  ?

  • G02B 13/08 - Anamorphotic objectives
  • G02B 27/14 - Beam splitting or combining systems operating by reflection only
  • G02B 13/14 - Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
  • G02B 27/18 - Optical systems or apparatus not provided for by any of the groups , for optical projection, e.g. combination of mirror and condenser and objective
  • G02B 23/04 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer
  • G02B 27/10 - Beam splitting or combining systems
  • G02B 9/16 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only arranged + – + all the components being simple
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G01N 15/14 - Electro-optical investigation
  • A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
  • G01N 15/10 - Investigating individual particles

49.

LASER MATERIAL PROCESSING DISTANCE GAUGE

      
Document Number 03078952
Status Pending
Filing Date 2018-10-10
Open to Public Date 2019-05-09
Owner COHERENT, INC. (USA)
Inventor Jefferies, Keith

Abstract

Apparatus for distance gauging in laser material processing includes a source of laser-radiation, an electrically-conductive focusing assembly, a constant-current source, and a voltmeter. The focusing assembly focuses laser-radiation towards an electrically conductive workpiece being processed. The focusing assembly and the workpiece form a capacitive sensor. The constant current source provides a constant electrical current to the focusing assembly for a constant time. The focusing assembly and the workpiece are separated by a distance that is proportional to a change in voltage measured on the focusing assembly during the constant time.

IPC Classes  ?

  • B23K 26/04 - Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
  • G01B 7/02 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width, or thickness

50.

LASER MATERIAL PROCESSING DISTANCE GAUGE

      
Application Number US2018055222
Publication Number 2019/089204
Status In Force
Filing Date 2018-10-10
Publication Date 2019-05-09
Owner COHERENT, INC. (USA)
Inventor Jefferies, Keith

Abstract

Apparatus for distance gauging in laser material processing includes a source of laser-radiation, an electrically-conductive focusing assembly, a constant-current source, and a voltmeter. The focusing assembly focuses laser-radiation towards an electrically conductive workpiece being processed. The focusing assembly and the workpiece form a capacitive sensor. The constant current source provides a constant electrical current to the focusing assembly for a constant time. The focusing assembly and the workpiece are separated by a distance that is proportional to a change in voltage measured on the focusing assembly during the constant time.

IPC Classes  ?

  • B23K 26/04 - Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
  • G01B 7/02 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width, or thickness

51.

Laser material processing distance gauge

      
Application Number 15801674
Grant Number 11014194
Status In Force
Filing Date 2017-11-02
First Publication Date 2019-05-02
Grant Date 2021-05-25
Owner Coherent, Inc. (USA)
Inventor Jefferies, Keith

Abstract

Apparatus for distance gauging in laser material processing includes a source of laser-radiation, an electrically-conductive focusing assembly, a constant-current source, and a voltmeter. The focusing assembly focuses laser-radiation towards an electrically conductive workpiece being processed. The focusing assembly and the workpiece form a capacitive sensor. The constant current source provides a constant electrical current to the focusing assembly for a constant time. The focusing assembly and the workpiece are separated by a distance that is proportional to a change in voltage measured on the focusing assembly during the constant time.

IPC Classes  ?

  • B23K 26/04 - Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
  • G01B 7/14 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
  • B23K 26/38 - Removing material by boring or cutting

52.

HIGH POWER SUB-400 FEMTOSECOND MOPA WITH SOLID-STATE POWER AMPLIFIER

      
Application Number US2018047357
Publication Number 2019/046049
Status In Force
Filing Date 2018-08-21
Publication Date 2019-03-07
Owner COHERENT, INC. (USA)
Inventor
  • Starodoumov, Andrei
  • Hodgson, Norman

Abstract

Laser-apparatus includes a fiber-MOPA arranged to deliver amplified seed optical pulses having a wavelength of about 1043 nanometers to a multi-pass ytterbium-doped yttrium aluminum garnet solid-state optical amplifier for further amplification.

IPC Classes  ?

  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/16 - Solid materials
  • H01S 3/067 - Fibre lasers
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating

53.

High power sub-400 femtosecond MOPA with solid-state power amplifier

      
Application Number 15692653
Grant Number 10535975
Status In Force
Filing Date 2017-08-31
First Publication Date 2019-02-28
Grant Date 2020-01-14
Owner Coherent, Inc. (USA)
Inventor
  • Starodoumov, Andrei
  • Hodgson, Norman

Abstract

Laser-apparatus includes a fiber-MOPA arranged to deliver amplified seed optical pulses having a wavelength of about 1043 nanometers to a multi-pass ytterbium-doped yttrium aluminum garnet solid-state optical amplifier for further amplification.

IPC Classes  ?

  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/067 - Fibre lasers
  • H01S 3/16 - Solid materials

54.

POLARIZED FIBER-LASER

      
Application Number US2018036606
Publication Number 2019/013911
Status In Force
Filing Date 2018-06-08
Publication Date 2019-01-17
Owner COHERENT, INC. (USA)
Inventor
  • Shu, Qi-Ze
  • Caprara, Andrea

Abstract

A fiber-laser includes a gain-fiber in a laser-resonator. A polarizer is located in the laser-resonator at an end thereof, causing the output of the fiber-laser to be linearly polarized. A wavelength-selective element is also included in the laser-resonator for selecting an output wavelength of the fiber-laser from within a gain-bandwidth of the gain-fiber.

IPC Classes  ?

55.

Polarized fiber-laser

      
Application Number 16000090
Grant Number 10944233
Status In Force
Filing Date 2018-06-05
First Publication Date 2019-01-10
Grant Date 2021-03-09
Owner Coherent, Inc. (USA)
Inventor
  • Shu, Qi-Ze
  • Caprara, Andrea

Abstract

A fiber-laser includes a gain-fiber in a laser-resonator. A polarizer is located in the laser-resonator at an end thereof, causing the output of the fiber-laser to be linearly polarized. A wavelength-selective element is also included in the laser-resonator for selecting an output wavelength of the fiber-laser from within a gain-bandwidth of the gain-fiber.

IPC Classes  ?

  • H01S 3/067 - Fibre lasers
  • H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/16 - Solid materials

56.

Intra-cavity frequency-converted optically-pumped semiconductor laser

      
Application Number 15602570
Grant Number 10177524
Status In Force
Filing Date 2017-05-23
First Publication Date 2018-11-29
Grant Date 2019-01-08
Owner Coherent, Inc. (USA)
Inventor Roth, Matthias

Abstract

An intra-cavity frequency-tripled OPS laser has a laser-resonator including two optically nonlinear crystals arranged for type-I frequency conversion. One of the crystals generates horizontally polarized second-harmonic radiation from vertically plane-polarized fundamental-wavelength radiation circulating in the laser-resonator. A birefringent filter is located between the optically nonlinear crystals. The birefringent filter selects the fundamental-wavelength, establishes the vertical polarization-orientation, and selectively rotates the polarization-orientation of the second-harmonic radiation from horizontal to vertical. The vertically polarized fundamental and second-harmonic radiations are type-I sum-frequency mixed by the other optically nonlinear crystal.

IPC Classes  ?

  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
  • H01S 3/109 - Frequency multiplication, e.g. harmonic generation
  • H01S 3/081 - Construction or shape of optical resonators or components thereof comprising three or more reflectors
  • H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode

57.

LASER APPARATUS FOR CUTTING BRITTLE MATERIAL WITH ASPHERIC FOCUSING MEANS AND A BEAM EXPANDER

      
Application Number US2017061386
Publication Number 2018/093732
Status In Force
Filing Date 2017-11-13
Publication Date 2018-05-24
Owner COHERENT, INC. (USA)
Inventor
  • Greenberg, Michael, R.
  • Gaudiosi, David, M.
  • Deile, Jochen

Abstract

An apparatus for cutting brittle material comprises beam expander (18) in combination with an aspheric focusing lens (22), an aperture (CA), and a laser-source (12) generating a beam (14) of pulsed laser-radiation. The aspheric lens (22) and the aperture (CA) form the beam (24) of pulsed laser-radiation into an elongated focus having a uniform intensity distribution along the optical axis of the aspheric focusing lens (22). The elongated focus extends through the full thickness of a workpiece (38) made of a brittle material. The workpiece (38) is cut by tracing the optical axis along a cutting line. Each pulse or burst of pulsed laser-radiation creates an extended defect through the full thickness of the workpiece (38).

IPC Classes  ?

  • B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/073 - Shaping the laser spot
  • B23K 26/08 - Devices involving relative movement between laser beam and workpiece
  • C03B 33/09 - Severing cooled glass by thermal shock
  • B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/066 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks
  • B23K 103/00 - Materials to be soldered, welded or cut

58.

Laser apparatus for cutting brittle material

      
Application Number 15352385
Grant Number 10668561
Status In Force
Filing Date 2016-11-15
First Publication Date 2018-05-17
Grant Date 2020-06-02
Owner coherent, inc. (USA)
Inventor
  • Greenberg, Michael R.
  • Gaudiosi, David M.
  • Deile, Jochen

Abstract

An apparatus for cutting brittle material comprises an aspheric focusing lens, an aperture, and a laser-source generating a beam of pulsed laser-radiation. The aspheric lens and the aperture form the beam of pulsed laser-radiation into an elongated focus having a uniform intensity distribution along the optical axis of the aspheric focusing lens. The elongated focus extends through the full thickness of a workpiece made of a brittle material. The workpiece is cut by tracing the optical axis along a cutting line. Each pulse or burst of pulsed laser-radiation creates an extended defect through the full thickness of the workpiece.

IPC Classes  ?

  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/073 - Shaping the laser spot
  • B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
  • B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
  • B23K 26/066 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms by using masks
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/08 - Devices involving relative movement between laser beam and workpiece
  • B23K 26/402 - Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
  • C03B 33/02 - Cutting or splitting sheet glass; Apparatus or machines therefor
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/30 - Collimators
  • B23K 26/16 - Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
  • B23K 103/00 - Materials to be soldered, welded or cut

59.

REFLECTIVE LASER LINE-BEAM GENERATOR

      
Application Number US2017055929
Publication Number 2018/075294
Status In Force
Filing Date 2017-10-10
Publication Date 2018-04-26
Owner COHERENT, INC. (USA)
Inventor
  • Hertwig, Michael
  • Caprara, Andrea
  • Winz, Michele, Wayne
  • Govorkov, Sergei

Abstract

A mirror is used to form a beam of laser-radiation having a uniform intensity distribution from a beam of laser-radiation having a non-uniform intensity distribution. The mirror has a reflective surface that has a compound shape, which is two inclined surfaces joined by a rounded apex. The compound-mirror is achromatic and can form a uniform intensity distribution from a polychromatic beam of laser-radiation. The uniform intensity distribution may be an isotropic distribution or a flat-top distribution in a plane. The non-uniform intensity distribution may be a Gaussian distribution from a laser source.

IPC Classes  ?

  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for

60.

Reflective laser line-beam generator

      
Application Number 15297564
Grant Number 09971159
Status In Force
Filing Date 2016-10-19
First Publication Date 2018-04-19
Grant Date 2018-05-15
Owner Coherent, Inc. (USA)
Inventor
  • Hertwig, Michael
  • Caprara, Andrea
  • Winz, Michele Wayne
  • Govorkov, Sergei

Abstract

A mirror is used to form a beam of laser-radiation having a uniform intensity distribution from a beam of laser-radiation having a non-uniform intensity distribution. The mirror has a reflective surface that has a compound shape, which is two inclined surfaces joined by a rounded apex. The compound-mirror is achromatic and can form a uniform intensity distribution from a polychromatic beam of laser-radiation. The uniform intensity distribution may be an isotropic distribution or a flat-top distribution in a plane. The non-uniform intensity distribution may be a Gaussian distribution from a laser source.

IPC Classes  ?

  • G02B 5/08 - Mirrors
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 5/10 - Mirrors with curved faces
  • G02B 27/30 - Collimators
  • G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising

61.

LASER POWER AND ENERGY SENSOR USING ANISOTROPIC THERMOELECTRIC MATERIAL

      
Application Number US2017053026
Publication Number 2018/063939
Status In Force
Filing Date 2017-09-22
Publication Date 2018-04-05
Owner COHERENT, INC. (USA)
Inventor
  • Krous, Krik
  • Lounsbury, Jimson
  • Imamura, Joseph
  • Schloss, James

Abstract

A laser-radiation detector is formed from a plurality of layers supported on a substrate. The plurality of layers includes a reflective metal layer and an oriented polycrystalline sensor-layer positioned between the metal layer and the substrate.

IPC Classes  ?

  • G01J 1/02 - Photometry, e.g. photographic exposure meter - Details
  • G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
  • G01J 1/04 - Optical or mechanical part
  • G01J 5/04 - Casings
  • G01J 5/06 - Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
  • G01J 5/12 - Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples

62.

Laser machining method and apparatus

      
Application Number 15649017
Grant Number 10423047
Status In Force
Filing Date 2017-07-13
First Publication Date 2018-02-01
Grant Date 2019-09-24
Owner Coherent, Inc. (USA)
Inventor Bellos, Michael Alexander

Abstract

A method of delivering a beam of laser-radiation to a workpiece for processing the workpiece comprises transmitting the beam twice through an inactive acousto-optic modulator (AOM) crystal in opposite zero-order directions of the AOM at separate locations on the AOM crystal, before delivering the beam to the workpiece. When laser-radiation is to be blocked from reaching the workpiece, the AOM is activated.

IPC Classes  ?

  • G02F 1/33 - Acousto-optical deflection devices
  • B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/02 - Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam

63.

LASER MACHINING METHOD AND APPARATUS

      
Application Number US2017042084
Publication Number 2018/022324
Status In Force
Filing Date 2017-07-14
Publication Date 2018-02-01
Owner COHERENT, INC. (USA)
Inventor Bellos, Michael Alexander

Abstract

A method of delivering a beam of laser-radiation to a workpiece for processing the workpiece comprises transmitting the beam twice through an acousto-optic modulator (AOM) crystal in opposite zero-order directions of the AOM at separate locations on the AOM crystal, before delivering the beam to the workpiece.

IPC Classes  ?

  • B23K 26/02 - Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
  • G02F 1/11 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves

64.

APPARATUS FOR GENERATING A LINE-BEAM FROM A DIODE-LASER ARRAY

      
Application Number US2017042229
Publication Number 2018/022331
Status In Force
Filing Date 2017-07-14
Publication Date 2018-02-01
Owner COHERENT, INC. (USA)
Inventor
  • Zhang, Rui
  • Caprara, Andrea

Abstract

An apparatus for generating a line beam (26) includes a diode laser bar (20), a linear microlens array (34) and a plurality of lenses (30, 32, 36, 38) spaced apart and arranged along an optical axis. The linear microlens array (34) and the lenses (30, 32, 36, 38) shape laser radiation emitted by the diode laser bar (20) to form a uniform line beam (26) in an illumination plane (28). The lenses (30, 32, 36, 38) project a far-field image of the diode laser bar (20) onto an image plane (62) proximate to the illumination plane (28). The diode laser bar (20) is rotated from parallel alignment with the linear microlens array (34) for providing uniform line beam illumination over a range of locations along the optical axis.

IPC Classes  ?

  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 19/00 - Condensers
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

65.

ACHROMATIC ANASTIGMATIC ANAMORPHIC PROJECTION OBJECTIVE FOR FOCUSING LASER BEAMS

      
Document Number 03030005
Status Pending
Filing Date 2017-07-13
Open to Public Date 2018-01-25
Owner COHERENT, INC. (USA)
Inventor
  • Meng, Lei
  • Winz, Michele Wayne

Abstract

In a flow cytometer, an objective lens (20) focuses in a common plane (P) an input laser-beam having four different wavelengths. The objective (20) consists of three single-lenses (CL1, CL2, FFL), the two first ones (CL1, CL2) being cylindrical for shaping and reducing the size of the input laser-beam, the third one (FFL) being spherical to focus the reduced-size laser-beam in the common plane (P).

IPC Classes  ?

  • G02B 9/16 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only arranged + – + all the components being simple
  • A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
  • G02B 13/00 - Optical objectives specially designed for the purposes specified below
  • G02B 13/08 - Anamorphotic objectives
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for

66.

ACHROMATIC ANASTIGMATIC ANAMORPHIC PROJECTION OBJECTIVE FOR FOCUSING LASER BEAMS

      
Application Number US2017042007
Publication Number 2018/017396
Status In Force
Filing Date 2017-07-13
Publication Date 2018-01-25
Owner COHERENT, INC. (USA)
Inventor
  • Meng, Lei
  • Winz, Michele, Wayne

Abstract

In a flow cytometer, an objective lens (20) focuses in a common plane (P) an input laser-beam having four different wavelengths. The objective (20) consists of three single-lenses (CL1, CL2, FFL), the two first ones (CL1, CL2) being cylindrical for shaping and reducing the size of the input laser-beam, the third one (FFL) being spherical to focus the reduced-size laser-beam in the common plane (P).

IPC Classes  ?

  • G02B 9/16 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only arranged + – + all the components being simple
  • G02B 13/00 - Optical objectives specially designed for the purposes specified below
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G01N 15/14 - Electro-optical investigation
  • A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
  • G02B 13/08 - Anamorphotic objectives

67.

Mechanically isolated optically pumped semiconductor laser

      
Application Number 15648317
Grant Number 10056732
Status In Force
Filing Date 2017-07-12
First Publication Date 2018-01-25
Grant Date 2018-08-21
Owner Coherent, Inc. (USA)
Inventor Wisdom, Jeffrey Alan

Abstract

A housing for an optically pumped semiconductor (OPS) laser resonator is terminated at one end thereof by an OPS-chip. The laser resonator is assembled on a platform with the OPS-chip at one end of the platform. The platform is fixedly attached to a baseplate at the OPS-chip end of the platform. The remainder of the platform extends over the baseplate with a gap between the platform and the baseplate. A pump-laser is mounted directly on the baseplate and delivers pump radiation to the OPS-chip.

IPC Classes  ?

68.

MECHANICALLY ISOLATED OPTICALLY PUMPED SEMICONDUCTOR LASER

      
Application Number US2017042014
Publication Number 2018/017397
Status In Force
Filing Date 2017-07-13
Publication Date 2018-01-25
Owner COHERENT, INC. (USA)
Inventor Wisdom, Jeffrey Alan

Abstract

A housing for an optically pumped semiconductor (OPS) laser resonator is terminated at one end thereof by an OPS-chip. The laser resonator is assembled on a platform with the OPS-chip at one end of the platform. The platform is fixedly attached to a baseplate at the OPS-chip end of the platform. The remainder of the platform extends over the baseplate with a gap between the platform and the baseplate. A pump-laser is mounted directly on the baseplate and delivers pump radiation to the OPS-chip.

IPC Classes  ?

69.

Achromatic anastigmatic anamorphic objective

      
Application Number 15646688
Grant Number 10338354
Status In Force
Filing Date 2017-07-11
First Publication Date 2018-01-18
Grant Date 2019-07-02
Owner COHERENT, INC. (USA)
Inventor
  • Meng, Lei
  • Winz, Michele Wayne

Abstract

In a flow cytometer, an objective lens for focusing an input laser-radiation beam including at least four different laser-radiation wavelengths in a common plane includes only three singlet lens-elements. Two of the elements are cylindrical elements arranged as a cylindrical telescope for shaping and reducing the size of the input laser-beam. The third element is a spherical element arranged to focus the reduced size beam in the common plane. In one example, all three elements are made from the same optical material.

IPC Classes  ?

  • G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
  • G02B 13/08 - Anamorphotic objectives
  • G01N 15/14 - Electro-optical investigation
  • G02B 9/16 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only arranged + – + all the components being simple
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/10 - Beam splitting or combining systems
  • G02B 27/14 - Beam splitting or combining systems operating by reflection only
  • G02B 13/00 - Optical objectives specially designed for the purposes specified below
  • A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

70.

Apparatus for generating a line-beam from a diode-laser array

      
Application Number 15236774
Grant Number 09851571
Status In Force
Filing Date 2016-08-15
First Publication Date 2017-12-26
Grant Date 2017-12-26
Owner Coherent, Inc. (USA)
Inventor
  • Zhang, Rui
  • Caprara, Andrea

Abstract

Apparatus for generating a line-beam includes a diode-laser bar, a linear micro-lens array, and a plurality of lenses spaced apart and arranged along an optical axis. The linear micro-lens array and the lenses shape laser-radiation emitted by the diode-laser bar to form a uniform line-beam in an illumination plane. The lenses project a far-field image of the diode-laser bar onto an image plane proximate to the illumination plane. The diode-laser bar is rotated from parallel alignment with the linear micro-lens array for providing uniform line-beam illumination over a range of locations along the optical axis.

IPC Classes  ?

  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • G02B 27/20 - Optical systems or apparatus not provided for by any of the groups , for optical projection, e.g. combination of mirror and condenser and objective for imaging minute objects, e.g. light-pointer
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 27/30 - Collimators

71.

LASER APPARATUS WITH EXCHANGEABLE PUMP MODULE

      
Application Number US2017036856
Publication Number 2017/218356
Status In Force
Filing Date 2017-06-09
Publication Date 2017-12-21
Owner COHERENT, INC. (USA)
Inventor Holleman, Guenter

Abstract

A modular solid-state laser (10) comprises a fiber coupled diode-laser pump module (20) and a laser-enclosure (50). The diode-laser pump module comprises a connector assembly 26 including a collimating lens (32) and produces a collimated beam (28B) of laser-radiation for pumping a gain-element (56) within the laser-enclosure. The beam of pump laser-radiation is focused into the gain-element by optics (54) located within the laser-enclosure. The diode-laser pump module can be replaced or exchanged without realigning optics located within the laser-enclosure by detaching and replacing the connector assembly from the laser enclosure.

IPC Classes  ?

  • H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
  • H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
  • H01S 3/06 - Construction or shape of active medium
  • G02B 6/38 - Mechanical coupling means having fibre to fibre mating means

72.

STACKABLE ELECTRICALLY-ISOLATED DIODE-LASER BAR ASSEMBLY

      
Application Number US2017029932
Publication Number 2017/204989
Status In Force
Filing Date 2017-04-27
Publication Date 2017-11-30
Owner COHERENT, INC. (USA)
Inventor
  • Liang, Xiaoping
  • Zhou, Fei

Abstract

A diode-laser bar assembly comprises a diode-laser bar mounted onto a cooler by way of an electrically-insulating submount. A laminated connector is provided that includes two electrically-conducting sheets bonded to opposite sides on an electrically- insulating sheet. An electrical insulator is located between the laminated connector and the cooler. One electrically-conducting sheet is connected to n-side of the diode-laser bar and the other electrically-conducting sheet is connected to p-side of the diode-laser bar.

IPC Classes  ?

  • H01S 5/024 - Arrangements for thermal management
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

73.

Stackable electrically-isolated diode-laser bar assembly

      
Application Number 15498253
Grant Number 09941658
Status In Force
Filing Date 2017-04-26
First Publication Date 2017-11-30
Grant Date 2018-04-10
Owner Coherent, Inc. (USA)
Inventor
  • Liang, Xiaoping
  • Zhou, Fei

Abstract

A diode-laser bar assembly comprises a diode-laser bar mounted onto a cooler by way of an electrically-insulating submount. A laminated connector is provided that includes two electrically-conducting sheets bonded to opposite sides on an electrically-insulating sheet. An electrical insulator is located between the laminated connector and the cooler. One electrically-conducting sheet is connected to n-side of the diode-laser bar and the other electrically-conducting sheet is connected to p-side of the diode-laser bar.

IPC Classes  ?

  • H01L 23/44 - Arrangements for cooling, heating, ventilating or temperature compensation the complete device being wholly immersed in a fluid other than air
  • H01S 5/024 - Arrangements for thermal management
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
  • H01S 5/022 - Mountings; Housings

74.

METHOD AND APPARATUS FOR LASER-CUTTING OF TRANSPARENT MATERIALS

      
Application Number US2017028302
Publication Number 2017/189295
Status In Force
Filing Date 2017-04-19
Publication Date 2017-11-02
Owner COHERENT, INC. (USA)
Inventor
  • Greenberg, Michael
  • Gaudiosi, David
  • Decker, Derek
  • Deile, Jochen
  • Jerman, John, H.

Abstract

A method for cutting a transparent brittle material using pulsed laser-radiation is disclosed. A beam of pulsed laser-radiation having an optical-axis is focused in the material by a variable-focus lens or mirror. The focus is translated along the optical-axis while the material is moved with respect to the beam to create an array of defects along a cutting path.

IPC Classes  ?

  • C03B 33/02 - Cutting or splitting sheet glass; Apparatus or machines therefor
  • B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 103/00 - Materials to be soldered, welded or cut

75.

Cooling apparatus for diode-laser bars

      
Application Number 15377491
Grant Number 09917413
Status In Force
Filing Date 2016-12-13
First Publication Date 2017-08-17
Grant Date 2018-03-13
Owner COHERENT, INC. (USA)
Inventor Guinn, Keith V.

Abstract

A cooler for diode-laser bars comprises a machined base including a water-input plenum and a water-output plenum, and a top plate on which the diode-laser bars can be mounted. A stack of three etched plates is provided between the base and first plate. The stack of etched plates is configured to provide a five longitudinally spaced-apart rows of eight laterally spaced-apart cooling-channels connected to the water-input and water-output plenums. Water flows in the cooling-channels and in thermal contact with the first plate.

IPC Classes  ?

  • H01S 5/024 - Arrangements for thermal management
  • H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

76.

COOLING APPARATUS FOR DIODE-LASER BARS

      
Application Number US2017014063
Publication Number 2017/139077
Status In Force
Filing Date 2017-01-19
Publication Date 2017-08-17
Owner COHERENT, INC. (USA)
Inventor Guinn, Keith, V.

Abstract

A cooler for diode-laser bars comprises a machined base including a water- input plenum and a water-output plenum, and a top plate on which the diode-laser bars can be mounted. A stack of three etched plates is provided between the base and first plate. The stack of etched plates is configured to provide a five longitudinally spaced- apart rows of eight laterally spaced-apart cooling-channels connected to the water-input and water-output plenums. Water flows in the cooling-channels and in thermal contact with the first plate.

IPC Classes  ?

  • H01S 5/024 - Arrangements for thermal management
  • F28F 3/08 - Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

77.

ABERRATION COMPENSATED DIODE-LASER STACK

      
Application Number US2017014850
Publication Number 2017/132209
Status In Force
Filing Date 2017-01-25
Publication Date 2017-08-03
Owner COHERENT, INC (USA)
Inventor
  • Chryssis, Athanasios
  • Ryu, Geunmin
  • Schleuning, David

Abstract

Optical output beams from a vertical stack of diode-laser bars are focused by a simple focusing lens on an optical axis of the lens. The optical output beams from outlying diode-laser bars in the vertical stack are tilted with respect to the optical axis of the focusing lens such that optical output from the whole vertical stack is brought to a common focus location on the optical axis of the focusing lens.

IPC Classes  ?

  • G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
  • G02B 19/00 - Condensers

78.

Aberration compensated diode-laser stack

      
Application Number 15414906
Grant Number 10539805
Status In Force
Filing Date 2017-01-25
First Publication Date 2017-07-27
Grant Date 2020-01-21
Owner Coherent, Inc. (USA)
Inventor
  • Chryssis, Athanasios
  • Ryu, Geunmin
  • Schleuning, David

Abstract

Optical output beams from a vertical stack of diode-laser bars are focused by a simple focusing lens on an optical axis of the lens. The optical output beams from outlying diode-laser bars in the vertical stack are tilted with respect to the optical axis of the focusing lens such that optical output from the whole vertical stack is brought to a common focus location on the optical axis of the focusing lens.

IPC Classes  ?

  • G02B 27/12 - Beam splitting or combining systems operating by refraction only
  • H01S 5/00 - Semiconductor lasers
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

79.

ENCLOSURE FOR MODIFIED OPTICAL FIBER

      
Application Number US2017012481
Publication Number 2017/123462
Status In Force
Filing Date 2017-01-06
Publication Date 2017-07-20
Owner COHERENT, INC. (USA)
Inventor
  • Anthon, Douglas, W.
  • Ingalls, Jay, Michael

Abstract

A mode- stripper for an optical fiber includes a water-cooled enclosure. A portion of an optical fiber to be mode-stripped is modified in a way which allows radiation to leak from cladding of the fiber. The optical fiber extends through the enclosure from a proximal end thereof to a distal end thereof, with the modified portion of the fiber within the enclosure. The fiber is fixedly held in the enclosure at the proximal end thereof and held at the distal end of the enclosure by an elastomeric diaphragm.

IPC Classes  ?

80.

Identification and analysis of materials and molecular structures

      
Application Number 15464114
Grant Number 10502688
Status In Force
Filing Date 2017-03-20
First Publication Date 2017-07-06
Grant Date 2019-12-10
Owner COHERENT, INC. (USA)
Inventor
  • Carriere, James
  • Ho, Lawrence
  • Havermeyer, Frank
  • Maye, Eric
  • Heyler, Randy

Abstract

Provided are methods and systems for identification and analysis of materials and molecular structures. An apparatus for identification and analysis of materials and molecular structures may include a laser. The laser may, in turn, include an amplified spontaneous emission-suppressed single-frequency laser excitation source. The apparatus may further comprise a plurality of filters. The plurality of filters may include reflective volume holographic grating blocking filters. The apparatus may also comprise an optical unit and an optical spectrometer. The optical unit may be configured to deliver excitation energy to a sample substance and capture Raman signal scattering from the sample substance. The optical spectrometer may be disposed in a path of the Raman signal and configured to measure a spectrum of the Raman signal and generate a detection signal. Finally, the apparatus may comprise a processing unit configured to analyze the spectrum.

IPC Classes  ?

  • G01J 3/44 - Raman spectrometry; Scattering spectrometry
  • G01N 21/65 - Raman scattering
  • G01N 21/3581 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation

81.

Stackable electrically-isolated diode-laser bar assembly

      
Application Number 15377222
Grant Number 10297980
Status In Force
Filing Date 2016-12-13
First Publication Date 2017-06-22
Grant Date 2019-05-21
Owner Coherent, Inc. (USA)
Inventor
  • Ryu, Geunmin
  • Chryssis, Athanasios
  • Schleuning, David

Abstract

A diode-laser assembly having an electrically isolated diode-laser bar on a cooled base-element is disclosed. The diode-laser bar is electrically isolated from the base-element and electrically isolated from any coolant water, thereby eliminating the need for de-ionized water and mitigating corrosion due to galvanic action. Multiple such diode-laser assemblies are stackable, with small bar-to-bar pitch, enabling a high-current and high-brightness diode-laser stack.

IPC Classes  ?

  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
  • H01S 5/022 - Mountings; Housings
  • H01S 5/30 - Structure or shape of the active region; Materials used for the active region
  • H01S 5/024 - Arrangements for thermal management

82.

STACKABLE ELECTRICALLY-ISOLATED DIODE-LASER BAR ASSEMBLY

      
Application Number US2016066381
Publication Number 2017/106192
Status In Force
Filing Date 2016-12-13
Publication Date 2017-06-22
Owner COHERENT, INC. (USA)
Inventor
  • Ryu, Geunmin
  • Chryssis, Athanasios
  • Schleuning, David

Abstract

A diode-laser assembly having an electrically isolated diode-laser bar (20) on a cooled base-element (80) is disclosed. The diode-laser bar is electrically isolated from the base-element and electrically isolated from any coolant water, thereby eliminating the need for de-ionized water and mitigating corrosion due to galvanic action. Multiple such diode-laser assemblies are stackable, with small bar-to-bar pitch, enabling a high-current and high-brightness diode-laser stack.The laser diode bar (20) may be attached to an insulating submount (70) by a hard solder (110). The submount (70) may be attached to a base (80) by a soft solder (120). The upper surface of the submount (70) may be plated with copper (90) to allow wire bonding (150) of the p-side (40) of the laser diode bar to an electrical p-contact (130).. The n-side (30) of the laser diode bar is wire bonded (190A,190B) to electrical n-contacts (170A,170B).

IPC Classes  ?

  • H01S 5/022 - Mountings; Housings
  • H01S 5/024 - Arrangements for thermal management
  • H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups

83.

Pulse-dividing method and apparatus for a pulsed carbon monoxide laser

      
Application Number 15339531
Grant Number 10274806
Status In Force
Filing Date 2016-10-31
First Publication Date 2017-05-11
Grant Date 2019-04-30
Owner Coherent, Inc. (USA)
Inventor
  • Hua, Gongxue
  • Mueller, Eric R.
  • Laughman, Lanny

Abstract

Laser-drilling apparatus includes a gas-discharge for laser emitting laser-radiation pulses, and two acousto-optic modulators (AOMs). The laser radiation pulses are characterized as having two temporal central portions between temporal leading and trailing edge portions. The AOMs are arranged to spatially separate the central temporal portions of the pulses from each other and from the leading and trailing edge portions of the pulses.

IPC Classes  ?

  • G02F 1/33 - Acousto-optical deflection devices
  • B23K 26/382 - Removing material by boring or cutting by boring
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H05K 3/00 - Apparatus or processes for manufacturing printed circuits
  • A45D 19/00 - Devices for washing the hair or the scalp; Similar devices for colouring the hair
  • A45D 24/22 - Combs with dispensing devices for liquids, pastes or powders
  • B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
  • B23K 26/064 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 101/42 - Printed circuits

84.

PULSE-DIVIDING METHOD AND APPARATUS FOR A PULSED CARBON MONOXIDE LASER

      
Application Number US2016060069
Publication Number 2017/079258
Status In Force
Filing Date 2016-11-02
Publication Date 2017-05-11
Owner COHERENT, INC. (USA)
Inventor
  • Hua, Gongxue
  • Mueller, Eric, R.
  • Laughman, Lanny
  • Ermold, Michael, Leigh

Abstract

Laser-drilling apparatus includes a gas-discharge for laser emitting laser- radiation pulses, and two acousto-optic modulators (AOMs). The laser radiation pulses are characterized as having two temporal central portions between temporal leading and trailing edge portions. The AOMs are arranged to spatially separate the central temporal portions of the pulses from each other and from the leading and trailing edge portions of the pulses.

IPC Classes  ?

  • B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
  • B23K 26/064 - Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
  • B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
  • G02F 1/11 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves

85.

Identification and analysis of materials and molecular structures

      
Application Number 14044773
Grant Number 09599565
Status In Force
Filing Date 2013-10-02
First Publication Date 2017-03-21
Grant Date 2017-03-21
Owner COHERENT, INC. (USA)
Inventor
  • Carriere, James
  • Ho, Lawrence
  • Havermeyer, Frank
  • Maye, Eric
  • Heyler, Randy

Abstract

Provided are methods and systems for identification and analysis of materials and molecular structures. An apparatus for identification and analysis of materials and molecular structures may include a laser. The laser may, in turn, include an amplified spontaneous emission-suppressed single-frequency laser excitation source. The apparatus may further comprise a plurality of filters. The plurality of filters may include reflective volume holographic grating blocking filters. The apparatus may also comprise an optical unit and an optical spectrometer. The optical unit may be configured to deliver excitation energy to a sample substance and capture Raman signal scattering from the sample substance. The optical spectrometer may be disposed in a path of the Raman signal and configured to measure a spectrum of the Raman signal and generate a detection signal. Finally, the apparatus may comprise a processing unit configured to analyze the spectrum.

IPC Classes  ?

86.

FIBER-LASER PUMPED CRYSTAL-LASER

      
Application Number US2016046188
Publication Number 2017/039980
Status In Force
Filing Date 2016-08-09
Publication Date 2017-03-09
Owner COHERENT, INC. (USA)
Inventor
  • Starodoumov, Andrei
  • Simanovski, Dmitri

Abstract

An apparatus for generating and amplifying laser beams at approximately 1 micrometer wavelength is disclosed. The apparatus includes an ytterbium-doped gain-crystal pumped by an ytterbium fiber-laser. The fiber-laser enables a pump wavelength to be selected that minimizes heating of the gain-crystal. The apparatus can be configured for generating and amplifying ultra- fast pulses, utilizing the gain-bandwidth of ytterbium-doped gain-crystals.

IPC Classes  ?

  • H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
  • H01S 3/16 - Solid materials
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • H01S 3/081 - Construction or shape of optical resonators or components thereof comprising three or more reflectors

87.

Thermally compensated optical probe

      
Application Number 14860611
Grant Number 09587983
Status In Force
Filing Date 2015-09-21
First Publication Date 2017-03-07
Grant Date 2017-03-07
Owner COHERENT, INC. (USA)
Inventor
  • Ho, Lawrence
  • Havermeyer, Frank
  • Moser, Christophe
  • Carriere, James
  • Maye, Eric
  • Heyler, Randy

Abstract

Systems and methods are provided herein. An exemplary system may include a laser source, the laser source having a laser center wavelength; at least one narrowband optical element receiving light emitted by the laser, the narrowband optical element having a filter center wavelength, the narrowband optical element being arranged such that the filter center wavelength is initially spectrally aligned with the laser center wavelength, the filter center wavelength changing in response to a temperature change such that the filter center wavelength is not substantially aligned with the laser center wavelength; and a passive adjustment mechanism coupled to the narrowband optical element, the passive adjustment mechanism including an actuator, the actuator moving in response to the temperature change, the actuator motion rotating the narrowband optical element, the rotation compensating for the temperature change such that the filter center wavelength and laser center wavelength remain spectrally aligned.

IPC Classes  ?

  • G01N 21/25 - Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
  • G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details
  • G01J 3/44 - Raman spectrometry; Scattering spectrometry
  • G01J 3/06 - Scanning arrangements
  • G03H 1/02 - HOLOGRAPHIC PROCESSES OR APPARATUS - Details peculiar thereto - Details
  • G02B 5/32 - Holograms used as optical elements
  • G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements

88.

Fiber-laser pumped crystal-laser

      
Application Number 14842058
Grant Number 09941654
Status In Force
Filing Date 2015-09-01
First Publication Date 2017-03-02
Grant Date 2018-04-10
Owner Coherent, Inc. (USA)
Inventor
  • Starodoumov, Andrei
  • Simanovski, Dmitri

Abstract

An apparatus for generating and amplifying laser beams at approximately 1 micrometer wavelength is disclosed. The apparatus includes an ytterbium-doped gain-crystal pumped by an ytterbium fiber-laser. The fiber-laser enables a pump wavelength to be selected that minimizes heating of the gain-crystal. The apparatus can be configured for generating and amplifying ultra-fast pulses, utilizing the gain-bandwidth of ytterbium-doped gain-crystals.

IPC Classes  ?

  • H01S 3/067 - Fibre lasers
  • H01S 3/16 - Solid materials
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
  • H01S 3/11 - Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
  • H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
  • H01S 3/06 - Construction or shape of active medium
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • H01S 3/081 - Construction or shape of optical resonators or components thereof comprising three or more reflectors

89.

Carbon monoxide laser machining system

      
Application Number 14830050
Grant Number 09925620
Status In Force
Filing Date 2015-08-19
First Publication Date 2017-02-23
Grant Date 2018-03-27
Owner Coherent, Inc. (USA)
Inventor
  • Mueller, Eric R.
  • Bellos, Michael Alexander

Abstract

Laser-machining apparatus includes a carbon monoxide (CO) laser emitting a beam of laser-radiation having forty-four different wavelength components and optical elements for delivering the radiation to workpiece. An acousto-optic modulator is provided for modulating the beam on the workpiece. A birefringent plate is provided in the beam transported to the workpiece for randomly polarizing radiation incident on the workpiece. A minimum distance of the workpiece from the laser, and the number of different-wavelength components in the laser beam provides that no optical isolator is required for preventing feedback of radiation into the laser.

IPC Classes  ?

  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/03 - Observing, e.g. monitoring, the workpiece
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • B23K 26/08 - Devices involving relative movement between laser beam and workpiece
  • H01S 3/08 - Construction or shape of optical resonators or components thereof
  • B23K 26/062 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam

90.

CARBON MONOXIDE LASER MACHINING SYSTEM

      
Application Number US2016043627
Publication Number 2017/030738
Status In Force
Filing Date 2016-07-22
Publication Date 2017-02-23
Owner COHERENT, INC. (USA)
Inventor
  • Mueller, Eric, R.
  • Bellos, Michael, Alexander

Abstract

Laser-machining apparatus includes a carbon monoxide (CO) laser emitting a beam of laser-radiation having forty-four different wavelength components and optical elements for delivering the radiation to workpiece. An acousto-optic modulator is provided for modulating the beam on the workpiece. A birefringent plate is provided in the beam transported to the workpiece for randomly polarizing radiation incident on the workpiece. A minimum distance of the workpiece from the laser, and the number of different-wavelength components in the laser beam provides that no optical isolator is required for preventing feedback of radiation into the laser.

IPC Classes  ?

  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
  • B23K 26/08 - Devices involving relative movement between laser beam and workpiece
  • H01S 3/08 - Construction or shape of optical resonators or components thereof

91.

TRANSPORT OF POLARIZED LASER-RADIATION USING A HOLLOW-CORE-FIBER

      
Application Number US2016030531
Publication Number 2016/182789
Status In Force
Filing Date 2016-05-03
Publication Date 2016-11-17
Owner COHERENT, INC. (USA)
Inventor
  • Hertwig, Michael
  • Hodgson, Norman
  • Simanovski, Dmitri

Abstract

Plane-polarized laser-radiation from a laser-source is converted to circularly polarized radiation by a quarter-wave plate (12). The circularly polarized radiation is input into a hollow-core fiber for transport to a point of use (20). The transported radiation is converted back to plane-polarized radiation by another quarter-wave (22) plate between the fiber and the point of use.

IPC Classes  ?

92.

Transport of polarized laser-radiation using a hollow-core fiber

      
Application Number 15098103
Grant Number 09684125
Status In Force
Filing Date 2016-04-13
First Publication Date 2016-11-17
Grant Date 2017-06-20
Owner Coherent, Inc. (USA)
Inventor
  • Hertwig, Michael
  • Hodgson, Norman
  • Simanovski, Dmitri

Abstract

Plane-polarized laser-radiation from a laser-source is converted to circularly polarized radiation by a quarter-wave plate. The circularly polarized radiation is input into a hollow-core fiber for transport to a point of use. The transported radiation is converted back to plane-polarized radiation by another quarter-wave plate between the fiber and the point of use.

IPC Classes  ?

  • G02B 6/02 - Optical fibres with cladding
  • G02B 6/024 - Optical fibres with cladding with polarisation-maintaining properties
  • G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
  • A61B 18/22 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Hand-pieces therefor

93.

Uniformity adjustment method for a diode-laser line-projector

      
Application Number 15207319
Grant Number 09784957
Status In Force
Filing Date 2016-07-11
First Publication Date 2016-11-03
Grant Date 2017-10-10
Owner Coherent, Inc. (USA)
Inventor
  • Nackerud, Erik
  • Lounsbury, Jimson
  • Kain, Patrick

Abstract

In a line projector a diode-laser beam having an elliptical cross-section is projected onto a Powell lens which spreads the beam to form a line of light. Distribution of power along the line of light is adjusted by rotating the diode-laser beam with respect to the Powell lens.

IPC Classes  ?

  • G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
  • G02B 19/00 - Condensers
  • G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for

94.

WATER-COOLED CARBON-DIOXIDE LASER

      
Application Number US2016024768
Publication Number 2016/171851
Status In Force
Filing Date 2016-03-29
Publication Date 2016-10-27
Owner COHERENT, INC. (USA)
Inventor Mueller, Eric, R.

Abstract

A carbon dioxide waveguide-laser includes an elongated resonator compartment and an elongated RF power supply compartment. The resonator and RF power-supply compartments are separated by a water-cooled heat sink.

IPC Classes  ?

  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/041 - Arrangements for thermal management for gas lasers
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms

95.

APPARATUS FOR COMBINING OUTPUTS OF FIBER-LASERS

      
Application Number US2016025031
Publication Number 2016/171856
Status In Force
Filing Date 2016-03-30
Publication Date 2016-10-27
Owner COHERENT, INC. (USA)
Inventor
  • Govorkov, Sergei
  • Anthon, Douglas, W.
  • Caprara, Andrea

Abstract

Diverging beams (13, 15, 17) from three fiber-lasers (12, 14, 16) are collimated by a three-segment composite lens (20). The collimated beams propagate parallel to each other to a single focusing lens (32) that focuses the collimated beams into a transport fiber (18).

IPC Classes  ?

  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media

96.

Air-cooled carbon-dioxide laser

      
Application Number 14688369
Grant Number 09614342
Status In Force
Filing Date 2015-04-16
First Publication Date 2016-10-20
Grant Date 2017-04-04
Owner Coherent, Inc. (USA)
Inventor
  • Mueller, Eric R.
  • Papanide, Adrian

Abstract

A carbon dioxide waveguide-laser includes an elongated resonator unit and an elongated power-supply unit. The resonator and power-supply units are spaced by a cooling unit including a plurality of longitudinally extending, spaced-apart fins, with fans arranged to drive air through the spaces between the fins.

IPC Classes  ?

  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/041 - Arrangements for thermal management for gas lasers
  • H01S 3/09 - Processes or apparatus for excitation, e.g. pumping

97.

AIR-COOLED CARBON-DIOXIDE LASER

      
Application Number US2016024948
Publication Number 2016/167964
Status In Force
Filing Date 2016-03-30
Publication Date 2016-10-20
Owner COHERENT, INC. (USA)
Inventor
  • Mueller, Eric, R.
  • Papanide, Adrian

Abstract

A carbon dioxide waveguide-laser includes an elongated resonator unit and an elongated RF power-supply unit. The resonator and RF power-supply units are spaced by a air cooling unit including a plurality of longitudinally extending, spaced-apart fins, with fans arranged to drive air through the spaces between the fins.

IPC Classes  ?

  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/041 - Arrangements for thermal management for gas lasers

98.

Multi-wavelength source of femtosecond infrared pulses

      
Application Number 14245913
Grant Number 09653867
Status In Force
Filing Date 2014-04-04
First Publication Date 2016-10-06
Grant Date 2017-05-16
Owner Coherent, Inc. (USA)
Inventor
  • Simanovski, Dmitri
  • Hodgson, Norman

Abstract

A source of femtosecond pulses at center wavelengths of about 940 nm and about 1140 nanometers (nm) includes a mode-locked fiber MOPA delivering pulses having a center wavelength of about 1040 nm. The 1040-nanometer pulses are spectrally spread into a continuum spectrum extending in range between about 900 nm and about 1200 nm and having well defined side-lobes around the 940-nm and 1140-wavelengths. Radiation is spatially selected from these side-lobes and delivered as the 940-nm and 1140-nm pulses.

IPC Classes  ?

  • H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
  • H01S 3/16 - Solid materials
  • H01S 3/067 - Fibre lasers
  • G02B 27/10 - Beam splitting or combining systems
  • G02B 27/42 - Diffraction optics
  • H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
  • G01J 3/14 - Generating the spectrum; Monochromators using refracting elements, e.g. prism
  • G01J 3/18 - Generating the spectrum; Monochromators using diffraction elements, e.g. grating
  • G02F 1/35 - Non-linear optics
  • G02F 1/365 - Non-linear optics in an optical waveguide structure

99.

Water-cooled carbon-dioxide laser

      
Application Number 14693704
Grant Number 09419404
Status In Force
Filing Date 2015-04-22
First Publication Date 2016-08-16
Grant Date 2016-08-16
Owner Coherent, Inc. (USA)
Inventor Mueller, Eric R.

Abstract

A carbon dioxide waveguide-laser includes an elongated resonator compartment and an elongated power supply compartment. The resonator and power-supply compartments are separated by a water-cooled heat sink.

IPC Classes  ?

  • H01S 3/04 - Arrangements for thermal management
  • H01S 3/041 - Arrangements for thermal management for gas lasers
  • H01S 3/223 - Gases the active gas being polyatomic, i.e. containing two or more atoms
  • H01S 3/097 - Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
  • H01S 3/03 - Constructional details of gas laser discharge tubes

100.

GAS-DISCHARGE LASER POWER AND ENERGY CONTROL

      
Application Number US2016012298
Publication Number 2016/112080
Status In Force
Filing Date 2016-01-06
Publication Date 2016-07-14
Owner COHERENT, INC. (USA)
Inventor
  • Field, Alan, H.
  • Allie, David

Abstract

The present disclosure is directed to simultaneously controlling peak pulse power and pulse energy in gas-discharge lasers. In an aspect, a radio-frequency power supply (104) that is coupled to a gas-discharge laser (102) is turned ON to initiate delivery of a laser pulse. The radio-frequency power supply is modulated ON/OFF to maintain the amplitude of the laser pulse at about a desired or prescribed value. Further, the radio-frequency power supply is turned OFF to terminate delivery of the laser pulse when the accumulated energy reaches reached a predefined energy threshold value.

IPC Classes  ?

  • H01S 3/03 - Constructional details of gas laser discharge tubes
  • H01S 1/06 - Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range gaseous
  • H01S 3/091 - Processes or apparatus for excitation, e.g. pumping using optical pumping
  • H01S 3/134 - Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation in gas lasers
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