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1. 发明公开

US20240213733A1 LASER ELEMENT AND ELECTRONIC DEVICE 审中-公开
公开(公告)号：US20240213733A1
公开(公告)日：2024-06-27
申请号：US18556953
申请日：2022-03-29
申请人： SONY GROUP CORPORATION
发明人： Masanao KAMATA , Gen YONEZAWA
IPC分类号： H01S3/082 , H01S3/113 , H01S5/183
CPC分类号： H01S3/082 , H01S3/113 , H01S5/183
摘要： A temperature rise in an optical resonator can be suppressed, or damage to the optical resonator due to laser light condensing can be avoided.
A laser element includes a semiconductor layer including a first reflection layer with respect to a first wavelength and an active layer that performs surface emission at the first wavelength, a laser medium arranged on a rear side of an optical axis of the semiconductor layer and including a second reflection layer with respect to a second wavelength on a first surface facing the semiconductor layer and a third reflection layer with respect to the first wavelength on a second surface on a side opposite to the first surface, a fourth reflection layer with respect to the second wavelength arranged on the second surface or arranged on a rear side of the optical axis with respect to the second surface, a first resonator that causes light having the first wavelength to resonate between the first reflection layer and the third reflection layer, a second resonator that causes light having the second wavelength to resonate between the second reflection layer and the fourth reflection layer, and an optical element arranged between the second reflection layer and the fourth reflection layer, the optical element that increases a beam diameter of the light having the second wavelength, in which the optical axis of the semiconductor layer, an optical axis of the laser medium, and an optical axis of the optical element are coaxially arranged.

2. 发明授权

US12003072B2 Q switch resonator, and pulse generator 有权
公开(公告)号：US12003072B2
公开(公告)日：2024-06-04
申请号：US17626789
申请日：2020-06-19
申请人： NICHIA CORPORATION
发明人： Masayuki Katsuragawa , Tetsushi Takano , Hisashi Ogawa
IPC分类号： H01S3/113 , G02F1/11 , H01S3/10 , H01S3/117 , H01S3/121 , H01S5/02208 , H01S5/065
CPC分类号： H01S3/10007 , G02F1/11 , H01S3/113 , H01S3/117 , H01S3/121 , H01S5/02208 , H01S5/0651
摘要： A Q switch resonator includes: an optical resonator comprising at least two mirrors, and configured to accumulate power of a continuous wave or an intermittent continuous wave incident from an outside; and a switching element provided in the optical resonator. The switching element is configured such that, when the power accumulated in the optical resonator increases to a predetermined level, the switching element outputs an optical pulse by lowering a Q factor from a first level to a second level lower than the first level.

3. 发明授权

US11881676B2 End-pumped Q-switched laser 有权
公开(公告)号：US11881676B2
公开(公告)日：2024-01-23
申请号：US16778454
申请日：2020-01-31
申请人： L3Harris Technologies, Inc.
发明人： Jeffrey A. Myers , Baoping Guo , Edward Miesak
IPC分类号： H01S3/0941 , H01S3/04 , H01S3/042 , H01S3/1115 , H01S3/06 , H01S3/094 , H01S3/16 , G01S7/481 , H01S3/17 , H01S3/113
CPC分类号： H01S3/09415 , H01S3/0401 , H01S3/042 , H01S3/0405 , H01S3/0604 , H01S3/094053 , H01S3/1115 , H01S3/1608 , G01S7/4814 , H01S3/061 , H01S3/0606 , H01S3/094084 , H01S3/113 , H01S3/1618 , H01S3/1685 , H01S3/1698 , H01S3/17 , H01S3/178
摘要： A laser system may include one or more of the following components: a power supply, a continuous wave pump laser, a fiber optic cable, a positive lens, a gain medium, a heat sink, and/or a Q-switch. The laser system may be used in a light detection and ranging (LIDAR) system such as a scanning LIDAR system. The laser system may be designed to operate at wavelengths that may be safe for human eyes.

4. 发明授权

US10868402B2 Passively Q-switched solid-state laser with compressed pulse duration 有权
公开(公告)号：US10868402B2
公开(公告)日：2020-12-15
申请号：US16533976
申请日：2019-08-07
申请人： MONTFORT Laser GmbH
发明人： Daniel Kopf
IPC分类号： H01S3/10 , H01S3/00 , H01S3/11 , H01S3/16 , H01S3/094 , H01S3/08 , H01S3/0941 , H01S3/06 , H01S3/113
CPC分类号： H01S3/0057 , H01S3/0627 , H01S3/08013 , H01S3/08054 , H01S3/09415 , H01S3/094003 , H01S3/094038 , H01S3/10046 , H01S3/113 , H01S3/1118 , H01S3/1611 , H01S3/1643 , H01S3/08036 , H01S3/1115
摘要： A passively Q-switched solid-state laser includes a resonator (1) with an active laser material (2) and a decoupling end mirror (6) for decoupling laser pulses that have a pulse duration of less than 1 ns from the resonator (1), an optical fiber (13), into which the laser pulses decoupled from the decoupling end mirror (6) are injected, and a chirped volume Bragg grating (17), at which the laser pulses are reflected after they have passed through the optical fiber (13) for shortening the pulse duration. The pulse duration after the reflection on the chirped volume Bragg grating (17) is less than 30 ps. The active laser material (2) is Nd:YAG and a saturable absorber (3) that is formed from Cr:YAG and has a transmission in the unsaturated state of less than 50% is also arranged in the resonator. The length (a) of the resonator (1) is from 1 mm to 10 mm and the laser pulses decoupled at the decoupling end mirror (6) have a pulse energy from 1 μJ to 200 μJ.

5. 发明申请

US20180269646A1 SOLID-STATE LASER FOR LIDAR SYSTEM 审中-公开
公开(公告)号：US20180269646A1
公开(公告)日：2018-09-20
申请号：US15901838
申请日：2018-02-21
申请人： LUMINAR TECHNOLOGIES, INC.
发明人： David Welford , Martin A. Jaspan , Jason M. Eichenholz , Scott R. Campbell , Lane A. Martin , Matthew D. Weed
IPC分类号： H01S3/11 , H01S3/0941 , H01S3/102 , G01S7/481 , H01S3/094 , G01S17/10 , G01S17/88 , H01S3/30
CPC分类号： H01S3/1115 , G01S7/4814 , G01S7/484 , G01S17/10 , G01S17/42 , G01S17/88 , H01S3/0092 , H01S3/061 , H01S3/0612 , H01S3/0621 , H01S3/0627 , H01S3/08 , H01S3/094076 , H01S3/094084 , H01S3/0941 , H01S3/09415 , H01S3/1022 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S3/1673 , H01S3/30
摘要： A lidar system can include a solid-state laser to emit pulses of light. The solid-state laser can include a Q-switched laser having a gain medium and a Q-switch. The lidar system can also include a scanner configured to scan the emitted pulses of light across a field of regard and a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system. The lidar system can also include a processor configured to determine the distance from the lidar system to the target based at least in part on a round-trip time of flight for an emitted pulse of light to travel from the lidar system to the target and back to the lidar system.

6. 发明授权

US09935420B2 Laser device, ignition system, and internal combustion engine 有权
公开(公告)号：US09935420B2
公开(公告)日：2018-04-03
申请号：US14869336
申请日：2015-09-29
申请人： Kazuma Izumiya , Tsuyoshi Suzudo , Naoto Jikutani , Yasuhiro Higashi , Kentaroh Hagita , Masayuki Numata , Nobuyuki Arai
发明人： Kazuma Izumiya , Tsuyoshi Suzudo , Naoto Jikutani , Yasuhiro Higashi , Kentaroh Hagita , Masayuki Numata , Nobuyuki Arai
IPC分类号： H01S3/113 , H01S3/16 , H01S3/067 , H01S5/183 , H01S5/00 , G02B27/09 , F02P23/04 , H01S3/094 , H01S5/022 , H01S5/42 , H01S3/06 , H01S3/0941
CPC分类号： H01S3/113 , F02P23/04 , G02B27/0955 , H01S3/0612 , H01S3/0627 , H01S3/06708 , H01S3/094049 , H01S3/094053 , H01S3/09415 , H01S3/1611 , H01S3/1643 , H01S5/005 , H01S5/02284 , H01S5/183 , H01S5/423
摘要： A laser device is provided including a surface emitting laser array configured to emit light, an optical system disposed in an optical path of light that is emitted from the surface emitting laser, a laser resonator which the light passed through the optical system enters, where the optical system includes a first optical element configured to collimate the light emitted from the surface emitting laser, and a second optical element configured to collect and condense the light collimated by the first optical element.

7. 发明授权

US09810786B1 Optical parametric oscillator for lidar system 有权
公开(公告)号：US09810786B1
公开(公告)日：2017-11-07
申请号：US15461380
申请日：2017-03-16
申请人： LUMINAR TECHNOLOGIES, INC.
发明人： David Welford , Martin A. Jaspan , Jason M. Eichenholz , Scott R. Campbell , Lane A. Martin , Matthew D. Weed
IPC分类号： G01S3/08 , G01S17/10 , G01S7/484
CPC分类号： G01S17/10 , G01S7/4812 , G01S7/4814 , G01S7/4817 , G01S7/484 , G01S17/42 , G02F1/39 , H01S3/0092 , H01S3/0612 , H01S3/0621 , H01S3/0627 , H01S3/09415 , H01S3/1086 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S3/1673
摘要： In one embodiment, a lidar system includes a pump laser configured to produce pulses of light at a pump wavelength. The lidar system further includes an optical parametric oscillator (OPO) with an OPO medium configured to: receive the pump pulses from the pump laser; convert at least part of the received pump pulses into pulses of light at a signal wavelength and pulses of light at an idler wavelength; and emit at least a portion of the signal pulses. The lidar system also includes a scanner configured to scan the emitted pulses of light across a field of regard and a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system. The lidar system also includes a processor configured to determine the distance from the lidar system to the target.

8. 发明申请

US20170317465A1 Laser Systems And Related Methods 审中-公开
公开(公告)号：US20170317465A1
公开(公告)日：2017-11-02
申请号：US15649897
申请日：2017-07-14
申请人： Candela Corporation
发明人： Jayant D. Bhawalkar , Xiaoming Shang , Jinze Qiu , Christopher J. Jones , James Hsia
IPC分类号： H01S3/16 , H01S3/06 , H01S3/067 , H01S3/08 , H01S3/092 , H01S3/094 , H01S3/131 , H01S3/11 , H01S3/109 , H01S3/23 , H01S3/113 , H01S3/10 , H01S3/00
CPC分类号： H01S3/1633 , H01S3/0092 , H01S3/061 , H01S3/0617 , H01S3/0625 , H01S3/0627 , H01S3/06754 , H01S3/08081 , H01S3/092 , H01S3/094053 , H01S3/094061 , H01S3/094069 , H01S3/10023 , H01S3/109 , H01S3/1115 , H01S3/113 , H01S3/1312 , H01S3/1611 , H01S3/1643 , H01S3/2308 , H01S2301/02
摘要： A MOPA laser system that includes a seed laser configured to output pulsed laser light, an amplifier configured to receive and amplify the pulsed laser light emitted by the seed laser; and a pump laser configured to deliver a pump laser beam to both the seed laser and the amplifier.

9. 发明申请

US20170201061A1 PASSIVE Q-SWITCH LASER DEVICE 有权
公开(公告)号：US20170201061A1
公开(公告)日：2017-07-13
申请号：US15401251
申请日：2017-01-09
申请人： INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL S
发明人： Takunori TAIRA , Arvydas KAUSAS , Lihe ZHENG
IPC分类号： H01S3/11 , H01S3/16 , H01S3/0941
CPC分类号： H01S3/1115 , H01S3/094053 , H01S3/094076 , H01S3/0941 , H01S3/09415 , H01S3/10053 , H01S3/1022 , H01S3/113 , H01S3/1611 , H01S3/1643
摘要： Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).

10. 发明申请

US20170107966A1 LASER IGNITION DEVICE PROVIDED WITH TRANSMISSIVE REFLECTIVE FILM 审中-公开
公开(公告)号：US20170107966A1
公开(公告)日：2017-04-20
申请号：US15123327
申请日：2015-03-04
申请人： DENSO CORPORATION , INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INTITUTES OF NATURAL SCIENCES
发明人： Kenji KANEHARA , Akimitsu SUGIURA , Takunori TAIRA
IPC分类号： F02P23/04 , H01S3/11 , H01S5/40 , H01S3/16 , H01S3/094 , H01S3/0941
CPC分类号： H01S3/0625 , F02P23/04 , G02B6/4296 , H01S3/025 , H01S3/0621 , H01S3/0627 , H01S3/094053 , H01S3/094076 , H01S3/09415 , H01S3/1115 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S5/0064 , H01S5/02252 , H01S5/02284 , H01S5/4012 , H01S5/4025 , H01S5/405
摘要： A laser ignition device capable of achieving stable ignition, preventing deterioration of a semiconductor laser element is provided, by suppressing the intensity of oscillated light leakage leaking towards semiconductor laser side from the laser resonator with a simple configuration. A laser ignition device 7 includes an excitation light source 1 emitting coherent excitation light LPMP, an optical element 2 transmitting excitation light LPMP, a laser resonator 3 oscillating oscillated light having high energy density by being irradiated with excitation light LPMP, and condensing means 6 condensing the oscillated light LPLS oscillated by the laser resonator 3. Moreover, the laser ignition device 7 is provided with a light-transmissive-reflective film 5 disposed between the excitation light source 1 and the laser resonator 3. The light-transmissive-reflective is film 5 permeating the excitation light LPMP having short wavelength and reflecting oscillated light leakage LLEAK having long wavelength.

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