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81. 发明授权

US10312657B2 Coherent combining pulse bursts in time domain 有权
公开(公告)号：US10312657B2
公开(公告)日：2019-06-04
申请号：US15724723
申请日：2017-10-04
申请人： THE REGENTS OF THE UNIVERSITY OF MICHIGAN
发明人： Almantas Galvanauskas
IPC分类号： H01S3/106 , H01S3/13 , H01S3/23 , H01S3/00 , G02B27/10
摘要： A beam combining and pulse stacking technique is provided that enhances laser pulse energy by coherent stacking pulse bursts (i.e. non-periodic pulsed signals) in time domain. This energy enhancement is achieved by using various configurations of Fabry-Perot, Gires-Tournois and other types of resonant cavities, so that a multiple-pulse burst incident at either a single input or multiple inputs of the system produces an output with a solitary pulse, which contains the summed energy of the incident multiple pulses from all beams. This disclosure provides a substantial improvement over conventional coherent-combining methods in that it achieves very high pulse energies using a relatively small number of combined laser systems, thus providing with orders of magnitude reduction in system size, complexity, and cost compared to current combining approaches.

82. 发明申请

US20190148904A1 METHOD OF CONTROLLING OPTICAL TRANSMITTER, AND OPTICAL TRANSMITTER 审中-公开
公开(公告)号：US20190148904A1
公开(公告)日：2019-05-16
申请号：US16191031
申请日：2018-11-14
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yasuhiro TANAKA
IPC分类号： H01S3/067 , H01S3/16 , H01S3/10 , H01S3/13
摘要： A method of controlling an optical transmitter includes steps of amplifying, by an EDFA, a main signal output from an optical modulator, attenuating and outputting, by a VOA, the main signal amplified and output by the EDFA, and maintaining an output power of the main signal output from the VOA at a predetermined value, suspending the phase modulation in the optical modulator to output continuous wave light from the optical modulator, disabling feedback control of the VOA that is performed by the VOA controller and maintaining a constant control signal of the VOA, disabling feedback control of a pump laser that is performed by a pump laser controller, and controlling the pump laser to modulate an intensity of the excitation light and generate an auxiliary signal having a cycle longer than a cycle of the main signal.

83. 发明申请

US20190131759A1 LASER DEVICE AND LASER STABILIZING METHOD 审中-公开
公开(公告)号：US20190131759A1
公开(公告)日：2019-05-02
申请号：US16173350
申请日：2018-10-29
申请人： MITUTOYO CORPORATION
发明人： Yusuke SHIRAKAWA
IPC分类号： H01S3/13 , H01S3/10 , H01S3/086
CPC分类号： H01S3/1303 , H01S3/005 , H01S3/025 , H01S3/0602 , H01S3/08027 , H01S3/086 , H01S3/09415 , H01S3/10069 , H01S3/109 , H01S3/1305 , H01S3/1392 , H01S2301/02
摘要： A laser device includes an excitation light source, a resonator which receives excitation light from the excitation light source and generates laser light, an absorption cell to which the laser light is emitted, a light converter which converts the laser light passing through the absorption cell to a light output signal, a third order differential lock-in amplifier which generates a third order differential signal of the light output signal, and a controller. When a predetermined waveform of the third order differential signal is detected, the controller includes a return controller that determines a return direction of a resonator length based on the predetermined waveform and a resonator length controller that changes the resonator length to the return direction.

84. 发明授权

US10256597B2 Yb: and Nd: mode locked oscillators and fiber systems incorporated in solid-state short pulse laser systems 有权
公开(公告)号：US10256597B2
公开(公告)日：2019-04-09
申请号：US15439062
申请日：2017-02-22
申请人： IMRA AMERICA, INC.
发明人： Donald J. Harter , Gyu C. Cho , Zhenlin Liu , Martin E. Fermann , Xinhua Gu , Salvatore F. Nati , Lawrence Shah , Ingmar Hartl , Mark Bendett
IPC分类号： H01S3/11 , H01S3/00 , H01S3/067 , H01S3/108 , H01S3/109 , H01S3/16 , H01S3/23 , H01S3/094 , H01S3/0941 , H01S3/13
摘要： The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.

85. 发明授权

US10250013B2 Laser system including optical amplification subsystem providing an amplified laser output 有权
公开(公告)号：US10250013B2
公开(公告)日：2019-04-02
申请号：US15860458
申请日：2018-01-02
申请人： CIVAN ADVANCED TECHNOLOGIES LTD.
发明人： Eyal Shekel
IPC分类号： G02B26/00 , G02F1/01 , H01S3/10 , H01S3/13 , H01S3/23 , H01S5/00 , H01S5/40 , H01S5/50 , G02B27/10 , H04B10/556 , H01S5/062
摘要： A laser system including a seed laser and an optical amplification subsystem, receiving an output of the seed laser and providing an amplified laser output, the optical amplification subsystem including a first plurality of amplifier assemblies, each of the first plurality of amplifier assemblies including a second plurality of optical amplifiers, and phase control circuitry including phase modulating functionality associated with each of the first plurality of amplifier assemblies.

86. 发明授权

US10211593B1 Optical amplifier with multi-wavelength pumping 有权
公开(公告)号：US10211593B1
公开(公告)日：2019-02-19
申请号：US15828415
申请日：2017-11-30
申请人： LUMINAR TECHNOLOGIES, INC.
发明人： Laurance S. Lingvay , Alain Villeneuve , Jason M. Eichenholz
IPC分类号： G01C3/08 , H01S3/094 , H01S3/067 , H01S5/40 , G01S7/484 , H01S3/13 , G01S17/10 , G02B27/10
摘要： In one embodiment, an optical amplifier includes a first pump laser diode and a second pump laser diode. The first pump laser diode is configured to produce pump light that includes a first amount of optical power at a first wavelength, and the second pump laser diode is configured to produce pump light that includes a second amount of optical power at a second wavelength different from the first wavelength. The optical amplifier also includes an optical gain fiber configured to receive the pump light from the first and second pump laser diodes and provide optical gain for an optical signal propagating through the optical gain fiber. The optical amplifier further includes a controller configured to adjust the first amount of optical power produced by the first pump laser diode and the second amount of optical power produced by the second pump laser diode.

87. 发明申请

US20190052045A1 RELATIVE PHASE MEASUREMENT FOR COHERENT COMBINING OF LASER BEAMS 审中-公开
公开(公告)号：US20190052045A1
公开(公告)日：2019-02-14
申请号：US16039263
申请日：2018-07-18
申请人： TRUMPF Scientific Lasers GmbH + Co. KG
发明人： Thomas Metzger , Matthias Haefner
IPC分类号： H01S3/10 , H01S3/23 , H01S3/13 , G01J9/00
摘要： A phase control system for controlling the relative phase (φ) of two laser beams of a laser system, which are to be coherently combined, is disclosed that enables providing a phase-controlled sum laser beam. An optical system of the phase control system includes a beam input for receiving a measuring portion of two collinear coherent laser beams, which are superimposed to form a sum laser beam, and provides measuring beams or measuring beam regions, which are used with associated photodetectors for outputting photodetector signals. For determining the relative phase from the photodetector signals, the phase control system has an evaluation device and a delay device for being inserted into the beam path of at least one of the two laser beams. The optical system is configured such that the measuring beams or measuring beam regions are related to different phase offsets.

88. 发明授权

US10205532B2 Laser power controller 有权
公开(公告)号：US10205532B2
公开(公告)日：2019-02-12
申请号：US15643958
申请日：2017-07-07
申请人： Hilight Semiconductor Limited
发明人： William Redman-White , Dominique Coue , Colin Whitfield
IPC分类号： H04B10/564 , H01S5/0683 , H01S5/068 , H01S5/042 , H01S3/13 , H04B10/50
摘要： A laser power controller employs: selection circuitry configured to select one of a data input value, a logical high value or a logical low value such that the selection circuitry selects the data input value during a data transmission period during a defined burst period and selects one of the logical high value and the logical low value during an extension time period during the defined burst period and immediately following the data transmission period; drive circuitry configured to apply, to a laser diode, a current corresponding to the value selected by the selection circuitry during the defined burst period or a zero value otherwise, the current being such that the laser diode is configured to provide an optical output; an optical sensor module configured to provide a sensor module output corresponding to the optical output of the laser diode, and configured to provide an electrical output proportional to the laser diode's optical output corresponding to the logical high value or the logical low value; and a controller configured to receive desired values regarding minimum and maximum optical output power levels of the laser diode and to receive the electrical output from the optical sensor module proportional to the optical output power level corresponding to the logical high and the logical low values; the controller being configured to use the received information to provide control values for the drive circuitry.

89. 发明申请

US20190044300A1 WAVELENGTH LOCKER, WAVELENGTH TUNABLE LASER APPARATUS, AND METHOD FOR CONTROLLING WAVELENGTH TUNABLE LASER APPARATUS 审中-公开
公开(公告)号：US20190044300A1
公开(公告)日：2019-02-07
申请号：US16050427
申请日：2018-07-31
申请人： FUJITSU LIMITED
发明人： Kazumasa Takabayashi , Suguru Akiyama
IPC分类号： H01S3/13 , G02B6/293
摘要： A wavelength locker includes a splitter configured to split a portion of light that is output from a light source into a first monitoring light and a second monitoring light; a first periodic filter configured to receive the first monitoring light; a second periodic filter configured to receive the second monitoring light; a first optical receiver configured to monitor an intensity of light that has passed through the first periodic filter; and a second optical receiver configured to monitor an intensity of light that has passed through the second periodic filter, wherein the first periodic filter and the second periodic filter each has a wavelength characteristic in which an intensity of transmitted light changes periodically with respect to a wavelength, and the wavelength characteristic of the first periodic filter and the wavelength characteristic of the second periodic filter shift in opposite wavelength directions when temperature changes.

90. 发明授权

US10186828B2 Laser transmitter for generating a coherent laser output signal with reduced self-phase modulation and method 有权
公开(公告)号：US10186828B2
公开(公告)日：2019-01-22
申请号：US15827851
申请日：2017-11-30
申请人： Raytheon Company
发明人： Fabio Di Teodoro
IPC分类号： H01S3/13 , H01S3/10 , H01S3/107 , H01S3/00 , H01S3/139 , H01S5/065 , G01S7/484 , H01S3/067
摘要： A laser transmitter is provided that includes a seed signal generator, an amplitude modulator and a power amplifier. The seed signal generator is configured to generate a seed signal that has a continuous waveform. The amplitude modulator is configured to generate a flat-top pulse signal based on the seed signal. The power amplifier is configured to generate a laser output signal based on the flat-top pulse signal.

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