公开(公告)号：US20240213733A1

公开(公告)日：2024-06-27

申请号：US18556953

申请日：2022-03-29

Applicant: SONY GROUP CORPORATION

Inventor： Masanao KAMATA ,  Gen YONEZAWA

IPC: H01S3/082 ,  H01S3/113 ,  H01S5/183

CPC classification number: H01S3/082 ,  H01S3/113 ,  H01S5/183

Abstract: 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.

公开(公告)号：US12003072B2

公开(公告)日：2024-06-04

申请号：US17626789

申请日：2020-06-19

Applicant: NICHIA CORPORATION

Inventor： Masayuki Katsuragawa ,  Tetsushi Takano ,  Hisashi Ogawa

IPC: H01S3/113 ,  G02F1/11 ,  H01S3/10 ,  H01S3/117 ,  H01S3/121 ,  H01S5/02208 ,  H01S5/065

CPC classification number: H01S3/10007 ,  G02F1/11 ,  H01S3/113 ,  H01S3/117 ,  H01S3/121 ,  H01S5/02208 ,  H01S5/0651

Abstract: 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.

公开(公告)号：US11881676B2

公开(公告)日：2024-01-23

申请号：US16778454

申请日：2020-01-31

Applicant: L3Harris Technologies, Inc.

Inventor： Jeffrey A. Myers ,  Baoping Guo ,  Edward Miesak

IPC: H01S3/0941 ,  H01S3/04 ,  H01S3/042 ,  H01S3/1115 ,  H01S3/06 ,  H01S3/094 ,  H01S3/16 ,  G01S7/481 ,  H01S3/17 ,  H01S3/113

CPC classification number: 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

Abstract: 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.

公开(公告)号：US20180269646A1

公开(公告)日：2018-09-20

申请号：US15901838

申请日：2018-02-21

Applicant: LUMINAR TECHNOLOGIES, INC.

Inventor： David Welford ,  Martin A. Jaspan ,  Jason M. Eichenholz ,  Scott R. Campbell ,  Lane A. Martin ,  Matthew D. Weed

IPC: H01S3/11 ,  H01S3/0941 ,  H01S3/102 ,  G01S7/481 ,  H01S3/094 ,  G01S17/10 ,  G01S17/88 ,  H01S3/30

CPC classification number: 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

Abstract: 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.

公开(公告)号：US09935420B2

公开(公告)日：2018-04-03

申请号：US14869336

申请日：2015-09-29

Applicant: Kazuma Izumiya ,  Tsuyoshi Suzudo ,  Naoto Jikutani ,  Yasuhiro Higashi ,  Kentaroh Hagita ,  Masayuki Numata ,  Nobuyuki Arai

Inventor： Kazuma Izumiya ,  Tsuyoshi Suzudo ,  Naoto Jikutani ,  Yasuhiro Higashi ,  Kentaroh Hagita ,  Masayuki Numata ,  Nobuyuki Arai

IPC: 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 classification number: 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

Abstract: 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.

公开(公告)号：US09810786B1

公开(公告)日：2017-11-07

申请号：US15461380

申请日：2017-03-16

Applicant: LUMINAR TECHNOLOGIES, INC.

Inventor： David Welford ,  Martin A. Jaspan ,  Jason M. Eichenholz ,  Scott R. Campbell ,  Lane A. Martin ,  Matthew D. Weed

IPC: G01S3/08 ,  G01S17/10 ,  G01S7/484

CPC classification number: 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

Abstract: 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.

公开(公告)号：US20170317465A1

公开(公告)日：2017-11-02

申请号：US15649897

申请日：2017-07-14

Applicant: Candela Corporation

Inventor： Jayant D. Bhawalkar ,  Xiaoming Shang ,  Jinze Qiu ,  Christopher J. Jones ,  James Hsia

IPC: 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 classification number: 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

Abstract: 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.

公开(公告)号：US20170201061A1

公开(公告)日：2017-07-13

申请号：US15401251

申请日：2017-01-09

Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL S

Inventor： Takunori TAIRA ,  Arvydas KAUSAS ,  Lihe ZHENG

IPC: H01S3/11 ,  H01S3/16 ,  H01S3/0941

CPC classification number: H01S3/1115 ,  H01S3/094053 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/10053 ,  H01S3/1022 ,  H01S3/113 ,  H01S3/1611 ,  H01S3/1643

Abstract: 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).

公开(公告)号：US20170107966A1

公开(公告)日：2017-04-20

申请号：US15123327

申请日：2015-03-04

Applicant: DENSO CORPORATION ,  INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INTITUTES OF NATURAL SCIENCES

Inventor： Kenji KANEHARA ,  Akimitsu SUGIURA ,  Takunori TAIRA

IPC: F02P23/04 ,  H01S3/11 ,  H01S5/40 ,  H01S3/16 ,  H01S3/094 ,  H01S3/0941

CPC classification number: 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

Abstract: 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.

公开(公告)号：US20170085051A1

公开(公告)日：2017-03-23

申请号：US15362531

申请日：2016-11-28

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. THOMSEN ,  Thomas T. ALKESKJOLD ,  Erik B. THOMSEN

IPC: H01S3/067 ,  G02F1/365 ,  H01S3/00 ,  G01S15/89 ,  H01S3/094 ,  H01S3/0941 ,  G01B9/02 ,  G01S7/52 ,  G02B6/02 ,  H01S3/11

CPC classification number: G02B6/02376 ,  G01B9/02007 ,  G01B9/02091 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/03633 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32 ,  H01S3/0092 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/11 ,  H01S3/113 ,  H01S3/1312 ,  H01S3/1611

Abstract: The invention relates to a supercontinuum light source comprising a microstructured optical fiber and a pump light source. The microstructured optical fiber comprises a core and a cladding region surrounding the core, as well as a first fiber length section, a second fiber length section and an intermediate fiber length section between said first and second fiber length sections. The first fiber length section comprises a core with a first characteristic core diameter. The second fiber length section comprises a core with a second characteristic core diameter, smaller than said first characteristic core diameter, where said second characteristic core diameter is substantially constant along said second fiber length section. The intermediate length section of the optical fiber comprises a core which is tapered from said first characteristic core diameter to said second characteristic core diameter over a tapered length.