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1032 条记录 (耗时 0.025 秒)

    Tunable laser
    1.
    发明授权
    Tunable laser 有权

    公开(公告)号：US12119607B2

    公开(公告)日：2024-10-15

    申请号：US17418597

    申请日：2019-12-26

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Yusuke Muranaka ,  Shinji Matsuo ,  Nobuhiro Nunoya ,  Toshikazu Hashimoto

    IPC分类号： H01S3/083 ,  H01S3/063 ,  H01S3/137

    CPC分类号： H01S3/137 ,  H01S3/063 ,  H01S3/083

    摘要： A wavelength tunable laser includes a filter region having a wavelength selection function on light from a gain region, wherein the filter region is a Sagnac interferometer and includes two ring resonators. The ring resonator has two optical couplers, and first and second curved waveguides connecting the two optical couplers, each of the two optical couplers is configured to receive input of the light from the gain region through an input-output port, to couple light of a resonant peak to a bar port of the input-output port, and to couple light except light at a resonant peak wavelength to a cross port of the input-output port, and the first curved waveguide connects the bar ports of the input-output ports of the two optical couplers, and the second curved waveguide connects the cross ports of ports, of two optical couplers, that the first curved waveguide is connected to.

    Piezo-tuned nonplanar ring oscillator with GHz range and 100 kHz bandwidth
    5.
    发明公开
    Piezo-tuned nonplanar ring oscillator with GHz range and 100 kHz bandwidth 审中-公开

    公开(公告)号：US20230238764A1

    公开(公告)日：2023-07-27

    申请号：US18099362

    申请日：2023-01-20

    申请人： Thomas James Kane ,  Kenji Numata ,  John Lawrence Nightingale

    发明人： Thomas James Kane ,  Kenji Numata ,  John Lawrence Nightingale

    IPC分类号： H01S3/083 ,  H01S3/06 ,  H01S3/10

    CPC分类号： H01S3/083 ,  H01S3/0627 ,  H01S3/1003

    摘要： A monolithic nonplanar ring oscillator (NPRO) laser with a large piezo-electric tuning range and high frequency slew rate, denoted as a μNPRO, is described. A tuning range of 3.5 GHz with 192 volts applied, corresponding to a tuning coefficient of 18.2 MHz/volt was experimentally demonstrated. This performance was achieved by making the solid-state gain element small, with a small distance between a piezo-electric element bonded to the solid-state gain element and a first lase plane in the solid-state gain element. The entire nonplanar ring lasing path within the solid-state gain element may lie within the half of the solid-state gain element closest to the bonded piezo-electric element. This large frequency modulation span and wide frequency modulation bandwidth, combined with unsurpassed coherence and high power, make this an attractive laser for frequency-modulated continuous-wave (FMCW) LIDAR.

    FABRY-PEROT BASED MULTI RESONANT CAVITY TUNABLE LASER
    6.
    发明公开
    FABRY-PEROT BASED MULTI RESONANT CAVITY TUNABLE LASER 审中-公开

    公开(公告)号：US20230231356A1

    公开(公告)日：2023-07-20

    申请号：US18085455

    申请日：2022-12-20

    申请人： ROCKLEY PHOTONICS LIMITED

    发明人： Sergio PINNA ,  Yi ZHANG ,  Richard GROTE

    IPC分类号： H01S3/083 ,  H01S3/08022 ,  H01S3/082

    CPC分类号： H01S3/083 ,  H01S3/08027 ,  H01S3/0823

    摘要： There is provided a laser, and/or a reflector for a laser cavity comprising: a ring resonator structure; and a Fabry-Perot filter connected in cascade to the ring resonator structure by a coupling waveguide. The coupling waveguide is configured to propagate light having a frequency corresponding to any of the resonant frequencies of the ring resonator structure to the Fabry-Perot filter, and the Fabry-Perot filter is configured to select one or more frequencies and return light having a frequency matching any of the selected frequencies to the ring resonator structure via the coupling waveguide.

    Concentric cylindrical circumferential laser
    8.
    发明授权
    Concentric cylindrical circumferential laser 有权

    公开(公告)号：US11658453B2

    公开(公告)日：2023-05-23

    申请号：US17103470

    申请日：2020-11-24

    申请人： Ronald LaComb ,  Kevin LaComb

    发明人： Ronald LaComb ,  Kevin LaComb

    IPC分类号： H01S3/083 ,  H01S3/06 ,  H01S3/067 ,  H01S3/0941 ,  H01S5/40 ,  H01S5/10 ,  H01S5/02255 ,  H01S5/042 ,  H01S5/22 ,  H01S5/12 ,  H01S5/20 ,  H01S5/42 ,  H01S5/185

    CPC分类号： H01S3/083 ,  H01S3/0627 ,  H01S3/0675 ,  H01S3/0941 ,  H01S5/1075 ,  H01S5/4056 ,  H01S5/02255 ,  H01S5/04254 ,  H01S5/04256 ,  H01S5/12 ,  H01S5/185 ,  H01S5/204 ,  H01S5/2219 ,  H01S5/4075 ,  H01S5/42

    摘要： The present disclosure relates to a three-dimensional cylindrical cavity-type laser system capable of supporting circumferential radial emission. A cylindrical ring waveguide provides optical confinement in the radial and axial dimensions thereby supporting a plurality of radial modes, one of a plurality of axial modes and a plurality of degenerate azimuthal modes. These modes constitute a set of traveling wave modes which propagate around the cylindrical ring waveguide possessing various degrees of optical confinement as quantified by their respective Q-factors. Index tailoring is used to tailor the radial refractive index profile and geometry of the waveguide to support radial modes possessing Q-factors capable of producing efficient radial emission, while gain tailoring is used to define a gain confining region which offsets modal gain factors of the modal constituency to favor a preferred set of modes supporting efficient radial emission out of the total modal constituency supported by the resonator. Under appropriate pump actuation the selected modes produce circumferential laser radiation with the output surface comprising of the entire outer perimeter of the cylindrical ring waveguide. The design is applicable toward both micro-resonators and resonators much larger than the optical wavelength, enabling high output powers and scalability. The circumferential radial laser emission can be concentrated by positioning the cylindrical ring laser inside a three-dimensional conical mirror thereby forming a laser ring of light propagating in the axial dimension away from the surface of the laser, which can be subsequently collimated for focused using conventional optics.

    LASER APPARATUS AND ELECTRONIC DEVICE MANUFACTURING METHOD
    9.
    发明申请
    LASER APPARATUS AND ELECTRONIC DEVICE MANUFACTURING METHOD 有权

    公开(公告)号：US20220393425A1

    公开(公告)日：2022-12-08

    申请号：US17818178

    申请日：2022-08-08

    申请人： Gigaphoton Inc.

    发明人： Yuki TAMARU ,  Taisuke MIURA

    IPC分类号： H01S3/225 ,  H01S3/083 ,  H01S3/23

    摘要： A laser apparatus according to an aspect of the present disclosure includes a master oscillator configured to emit a laser beam, an amplifier including an optical resonator and configured to amplify the laser beam emitted by the master oscillator in the optical resonator, and a phase shift structure disposed on an optical path between the master oscillator and the amplifier at a position closer to the amplifier than a middle point of the optical path. The phase shift structure includes a plurality of cells having different phase shift amounts for the laser beam. The cells have a disposition interval of 80 μm to 275 μm inclusive.