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    Auto Flux Timing for Current Resonant Laser Diode Driver
    2.
    发明公开
    Auto Flux Timing for Current Resonant Laser Diode Driver 审中-公开

    公开(公告)号：US20240113502A1

    公开(公告)日：2024-04-04

    申请号：US17937625

    申请日：2022-10-03

    申请人： Silanna Asia Pte Ltd

    发明人： Joseph H. Colles ,  Steven E. Rosenbaum ,  Stuart B. Molin

    IPC分类号： H01S5/042 ,  H01S5/026 ,  H01S5/062 ,  H01S5/068 ,  H01S5/40

    CPC分类号： H01S5/0428 ,  H01S5/0261 ,  H01S5/06216 ,  H01S5/06808 ,  H01S5/06825 ,  H01S5/4025

    摘要： A pulsed laser diode driver includes a source capacitor that receives a refresh current at a first terminal and develops a source voltage therefrom. A first terminal of an inductor is connected to the first terminal of the source capacitor. A second terminal of the inductor is connected to an anode of a laser diode and a bypass capacitor. One or more switches are configured to control a current flow through the inductor. A timing and control circuit is configured to receive the source voltage and to generate one or more gate driver signals to control the switches to produce a high-current pulse through the laser diode. The high-current pulse corresponds to a peak current of a resonant waveform developed at the anode of the laser diode. A timing of the one or more gate driver signals is based on a voltage level of the source voltage.

    Apparatus and methods for safe pulsed laser operation
    3.
    发明授权
    Apparatus and methods for safe pulsed laser operation 有权

    公开(公告)号：US11784462B2

    公开(公告)日：2023-10-10

    申请号：US16988420

    申请日：2020-08-07

    申请人： VELODYNE LIDAR USA, INC.

    发明人： Oren Milgrome ,  Tyler Banas ,  Phillip Edwards

    IPC分类号： H01S5/068 ,  G01S7/484

    CPC分类号： H01S5/06808 ,  G01S7/484 ,  H01S5/06825

    摘要： An apparatus may include an energy rate limiter, an electro-optical transmitter, and an energy monitor. The energy rate limiter limits energy transfer, based on an energy control signal, from a power supply to the energy storage module. The energy storage module is charged based on the energy transfer from the power supply. The electro-optical transmitter includes lasers coupled to local energy storage module. Laser firings of the lasers are based on an electrical potential of the energy storage module and laser enable signals corresponding to the lasers. The energy monitor is coupled to the energy storage module and triggers a safety alarm signal if a voltage provided by the energy storage module violates a safety condition related to a threshold voltage. The energy rate limiter terminates the energy transfer from the power supply to the local energy storage module after the safety condition is violated.

    LASER DEVICE
    5.
    发明申请
    LASER DEVICE 审中-公开

    公开(公告)号：US20180166852A1

    公开(公告)日：2018-06-14

    申请号：US15837159

    申请日：2017-12-11

    申请人： FANUC CORPORATION

    发明人： Tooru NUKUI

    IPC分类号： H01S5/024 ,  H01S5/06 ,  H01S5/068 ,  H01S5/0683

    CPC分类号： H01S5/02423 ,  H01S5/02438 ,  H01S5/02453 ,  H01S5/02461 ,  H01S5/0612 ,  H01S5/0617 ,  H01S5/06804 ,  H01S5/06825 ,  H01S5/06837 ,  H01S5/4025

    摘要： To provide a laser device capable of detecting overheating (abnormality) of a heat-generating part by detecting a temperature of a cooling member for cooling the heat-generating part. A laser device includes one or a plurality of heat-generating part(s), one or a plurality of cooling member(s) respectively disposed in contact with the one or plurality of heat-generating part(s), the one or plurality of cooling member(s) containing a refrigerant flowing inside, one or a plurality of first temperature detection part(s) respectively disposed on the one or plurality of cooling member(s) to respectively detect temperatures of the one or plurality of cooling member(s), and a monitoring part capable of detecting an abnormality respectively in the one or plurality of cooling member(s) based on temperature information including information on the temperatures detected by the one or plurality of first temperature detection part(s).

    LASER DEVICE
    7.
    发明申请
    LASER DEVICE 有权

    公开(公告)号：US20180054037A1

    公开(公告)日：2018-02-22

    申请号：US15666185

    申请日：2017-08-01

    申请人： FANUC CORPORATION

    发明人： Masahiro HONDA ,  Yasuyuki TANAKA

    IPC分类号： H01S5/022 ,  H01S5/024

    CPC分类号： H01S5/022 ,  H01S5/0222 ,  H01S5/02407 ,  H01S5/02415 ,  H01S5/02423 ,  H01S5/02469 ,  H01S5/06825

    摘要： To provide a laser device allowing the prevention of dew formation on a cooler of the laser device, while contributing to a longer lifetime of a humidity sensor to be used. A laser device includes a laser diode and a cooler for cooling the laser diode. The laser diode and the cooler are provided in a housing. The laser device includes: a humidity detector that detects humidity in the laser device while current is applied to the humidity detector; and a current application controller that controls the time of current application to the humidity detector. In one aspect of the laser device, the laser device further includes: a temperature detector that detects a temperature in the housing; and a dew point calculator that calculates a dew point based on the humidity detected by the humidity detector, and the temperature detected by the temperature detector. The current application controller controls the time of current application to the humidity detector based on the dew point calculated by the dew point calculator.

    FAILSAFE PULSED LASER DRIVER
    9.
    发明申请
    FAILSAFE PULSED LASER DRIVER 审中-公开

    公开(公告)号：US20180006431A1

    公开(公告)日：2018-01-04

    申请号：US15200147

    申请日：2016-07-01

    申请人： Intel Corporation

    发明人： Paul Winer ,  Krishna Swaminathan

    IPC分类号： H01S5/042 ,  H01S5/42 ,  H04N5/33

    CPC分类号： H01S5/0428 ,  G06T7/50 ,  H01S5/06825 ,  H01S5/40 ,  H01S5/42 ,  H01S5/423

    摘要： A failsafe pulsed laser driver and method for using the same are disclosed. In one embodiment, an apparatus comprises a laser array having a plurality of lasers; and a laser driver coupled to the laser array, wherein the laser driver comprises a current limiter to provide a maximum current at or below a threshold current of lasers in the laser array or at a current level to meet laser safety requirements under circuit failure conditions; one or more capacitors coupled to current limiter and the laser array, the one or more capacitors to be charged in response to current from the current limiter; and a switch coupled to the one or more capacitors operable to cause current from the one or more capacitors to flow through the laser array.