公开(公告)号：US20240339804A1

公开(公告)日：2024-10-10

申请号：US18132047

申请日：2023-04-07

申请人： Khanh Le ,  John Lekavich ,  Bao Tran

发明人： Khanh Le ,  John Lekavich ,  Bao Tran

IPC分类号： H01S3/117 ,  H01S3/00 ,  H01S3/1123 ,  H01S3/115

CPC分类号： H01S3/117 ,  H01S3/0057 ,  H01S3/1123 ,  H01S3/115

摘要： A laser metal deposition system includes a laser source those laser beam is provided to an acousto-optic deflector that includes an optical element having a surface with one or more steps formed thereon; a conductive layer formed on the surface with the steps; one or more crystals secured to each step; and electrodes positioned on each surface of each crystal.

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.

公开(公告)号：US11791602B2

公开(公告)日：2023-10-17

申请号：US17057072

申请日：2019-05-22

申请人： JERUSALEM COLLEGE OF TECHNOLOGY

发明人： Salman Noach ,  Uzziel Sheintop ,  Eytan Moshe Perez

IPC分类号： H01S3/117 ,  H01S3/1115 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/106 ,  H01S3/16

CPC分类号： H01S3/1115 ,  H01S3/08059 ,  H01S3/09415 ,  H01S3/094053 ,  H01S3/1062 ,  H01S3/117 ,  H01S3/1616 ,  H01S3/1638 ,  H01S3/1653

摘要： A laser system, comprising: a laser cavity, a gain medium positioned within the laser cavity, a pump source optically coupled to the gain medium, an input minor positioned at a first end of the laser cavity, an output coupler positioned at a second end of the laser cavity, a first etalon positioned within the laser cavity, and a q-switching element positioned within the laser cavity, wherein the laser system is configured to provide a laser beam at a selected wavelength ranging of 1700 to 3000 nm with a tunable spectral range of at least 10 nm. A method for using the laser system e.g., for producing a pulsed laser beam is further disclosed.

公开(公告)号：US11251582B2

公开(公告)日：2022-02-15

申请号：US16280628

申请日：2019-02-20

申请人： UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF NASA

发明人： Mulugeta Petros ,  Tamer Refaat ,  Upendra N. Singh ,  Charles W. Antill

IPC分类号： H01S5/0687 ,  H01S3/11 ,  H01S3/108 ,  H01S3/117 ,  H01S3/10 ,  H01S3/13 ,  H01S3/067 ,  H01S5/00 ,  H01S3/23

摘要： Aspects of the present disclosure are directed to methods and apparatuses for generating laser light. As may be implemented in accordance with one or more embodiments, laser light is generated at a laser light source and is modulated in response to a frequency modulation signal, to generate a plurality of different wavelengths of laser light. The frequency modulation signal is generated, for each particular one of the wavelengths of laser light, at a respective seeding frequency corresponding to the particular one of the wavelengths in which the seeding frequency is different for each of the different wavelengths. Such an approach may, for example, involve generating the frequency modulation signal with a frequency generator circuit and using the frequency modulation signal to control an electro-optical modulator for modulating the wavelength of the laser light.

公开(公告)号：US11193219B2

公开(公告)日：2021-12-07

申请号：US16313031

申请日：2017-09-30

申请人： SHANDONG UNIVERSITY

发明人： Xutang Tao ,  Weiqun Lu ,  Zeliang Gao ,  Youxuan Sun ,  Qian Wu

IPC分类号： C30B29/46 ,  C30B9/12 ,  H01S3/117 ,  C01B19/00

摘要： The present disclosure relates to tellurite crystals, growing methods of the same, and applications thereof; the crystals a chemical formula of MTe3O8, wherein M=Ti, Zr, Hf, which belongs to an Ia-3 space group of a cubic crystal system, wherein a transmittance waveband ranges from visible light to infrared light, with a transparency ≥70%. According to the present disclosure, a growing method of a tellurite crystal is provided, wherein the crystal may be grown using a flux method, a Czochralski method, or a Bridgman-Stockbarger method. The tellurite crystals may be used as an acousto-optic crystal for fabricating an optical modulation device. The present disclosure takes the lead internationally in growing the tellurite single crystals, the size and quality of which sufficiently meet the demands of practical applications of the tellurite single crystals.

公开(公告)号：US20190252847A1

公开(公告)日：2019-08-15

申请号：US16342247

申请日：2017-10-18

申请人： Fujikura Ltd.

发明人： Ren Suzuki ,  Naoki Murakoshi

IPC分类号： H01S3/117 ,  H01S3/067

CPC分类号： H01S3/117 ,  H01S3/067 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/1655 ,  H01S3/2308 ,  H01S3/302

摘要： A seed unit (MO) includes a plurality of optical paths sharing a part thereof and causing light to be resonated thereon, an amplification optical fiber (13) serving as a part of each of the optical paths and amplifying respective light beams resonated on the respective optical paths, and; an AOM (14) arranged at a part shared by the respective optical paths and switchable between a first state, in which the AOM (14) vibrates at a predetermined cycle and emits light incident from the optical paths to the optical paths, and a second state, in which the AOM (14) emits light incident from the optical paths to a path other than the optical paths. A resonance cycle of light having highest power out of the light beams resonated on the optical paths and the predetermined cycle at which the AOM (14) vibrates in the first state have a non-integral multiple relationship.

公开(公告)号：US20190226911A1

公开(公告)日：2019-07-25

申请号：US16277705

申请日：2019-02-15

申请人： ITI Scotland - Scottish Enterprise

发明人： Graeme Malcolm ,  Gordon Robertson

IPC分类号： G01J3/10 ,  H01S3/16 ,  H01S3/117 ,  G01N21/359 ,  G01J3/42 ,  G01N21/3504 ,  H01S3/108 ,  H01S3/094 ,  H01S3/081 ,  G01N21/47 ,  G01N21/49

CPC分类号： G01J3/108 ,  G01J3/42 ,  G01N21/3504 ,  G01N21/359 ,  G01N21/4738 ,  G01N21/49 ,  G01N2021/4769 ,  G01N2201/06113 ,  G01V8/005 ,  H01S3/081 ,  H01S3/082 ,  H01S3/094 ,  H01S3/1083 ,  H01S3/11 ,  H01S3/117 ,  H01S3/161 ,  H01S3/163 ,  H01S3/1643

摘要： An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (5). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector (32) detects radiation backscattered from the target (5). An analyser determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP2 (ZGP) crystal. On stimulation by the pump beam, the ZnGeP2 (ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the spectrum and an idler beam having a wavelength in the mid-infrared region of the spectrum. The laser gain medium and the ZnGeP2 (ZGP) crystal are located in the pump wave cavity.

公开(公告)号：US10247606B2

公开(公告)日：2019-04-02

申请号：US14424933

申请日：2013-08-30

申请人： ITI Scotland—Scottish Enterprise

发明人： Graeme Malcolm ,  Gordon Robertson

IPC分类号： G01J3/10 ,  G01N21/3504 ,  H01S3/108 ,  G01N21/359 ,  G01J3/42 ,  G01N21/47 ,  G01N21/49 ,  H01S3/081 ,  H01S3/094 ,  H01S3/117 ,  H01S3/16 ,  H01S3/082 ,  H01S3/11 ,  G01V8/00

摘要： An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (5). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector (32) detects radiation backscattered from the target (5). An analyzer determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP2 (ZGP) crystal. On stimulation by the pump beam, the ZnGeP2 (ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the spectrum and an idler beam having a wavelength in the mid-infrared region of the spectrum. The laser gain medium and the ZnGeP2 (ZGP) crystal are located in the pump wave cavity.

公开(公告)号：US10038297B2

公开(公告)日：2018-07-31

申请号：US15329459

申请日：2015-07-21

申请人： Valstybinis Moksliniu Tyrimu Institutas Fiziniu Ir Technologijos Mokslu Centras

发明人： Kestutis Regelskis ,  Gediminas Raciukaitis

IPC分类号： H01S3/117 ,  H01S3/30 ,  H01S3/067 ,  H01S3/106 ,  H01S3/11 ,  H01S3/08 ,  H01S5/50

CPC分类号： H01S3/06791 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/08027 ,  H01S3/082 ,  H01S3/10092 ,  H01S3/106 ,  H01S3/1112 ,  H01S5/5018

摘要： This invention relates to the field of laser technology and more particularly to the ultra-short pulse generation methods and generators. One round trip of the ultra-short light pulse formation inside a generator optical loop comprises these steps: amplification of the light pulse, spectral broadening of the amplified light pulse due to the optical Kerr effect inside the optically transparent medium, selection of the predeterminated spectral components of the spectrally broadened light pulses by using the first spectrally-sensitive optical element, then again follows amplification of the selected light pulses, spectral broadening of the amplified light pulse due to the optical Kerr effect inside the optically transparent medium and selection of the predeterminated spectral components of the spectrally broadened light pulses by using the second spectrally-sensitive optical element, where spectral components of the light pulses selected using the first spectrally-sensitive optical element are different than the spectral components of the light pulses selected using the second spectrally-sensitive optical element.

公开(公告)号：US20180058935A1

公开(公告)日：2018-03-01

申请号：US15246870

申请日：2016-08-25

申请人： U.S.A. as represented by the Administrator of the National Aeronautics and Space Administration

发明人： ANTHONY W. YU ,  MICHAEL A. KRAINAK ,  Diego Janches ,  Sarah L. Jones ,  Branimir Blagojevic

IPC分类号： G01J5/10 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/30 ,  H01S3/08 ,  H01S3/06 ,  H01S3/117 ,  H01S3/04 ,  H01S3/13 ,  H01S3/00 ,  G01N21/39 ,  G01S17/88

CPC分类号： G01J5/10 ,  G01N21/39 ,  G01N2021/1793 ,  G01N2021/399 ,  G01N2201/068 ,  G01S7/4814 ,  G01S17/102 ,  G01S17/95 ,  H01S3/0085 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/0602 ,  H01S3/0606 ,  H01S3/08095 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/108 ,  H01S3/109 ,  H01S3/117 ,  H01S3/1303 ,  H01S3/1611 ,  H01S3/1673 ,  Y02A90/19

摘要： The present invention relates an apparatus and method for measuring range-resolved atmospheric sodium temperature profiles using a space-based Lidar instrument, including a diode-pumped Q-switched self-Raman c-cut Nd:YVO4 laser with intra-cavity frequency doubling that could produce multi-watt 589 nm wavelength output. The c-cut Nd:YVO4 laser has a fundamental wavelength that is tunable from 1063-1067 nm. A continuous wave narrow linewidth diode laser is used as an injection seeder to provide single-frequency grating tunable output around 1066 nm. The injection-seeded self-Raman shifted Nd:VO4 laser is tuned across the sodium vapor D2 line at 589 nm. In one embodiment, a space-qualified frequency-doubled 9 Watt at 532 nm wavelength Nd:YVO4 laser, is utilized with a tandem interference filter temperature-stabilized fused-silica-etalon receiver and high-bandwidth photon-counting detectors.