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    LIDAR SYSTEM WITH INTEGRATED CIRCULATOR
    12.
    发明申请
    LIDAR SYSTEM WITH INTEGRATED CIRCULATOR 审中-公开

    公开(公告)号：US20200088848A1

    公开(公告)日：2020-03-19

    申请号：US16554858

    申请日：2019-08-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Richard Kremer ,  Timothy J. Talty ,  Pamela R. Patterson ,  Biqin Huang ,  Michael Mulqueen

    IPC: G01S7/481 ,  G01S17/08 ,  G01S17/93 ,  G05D1/02

    Abstract: A vehicle, Lidar system and method of detecting an object is disclosed. The Lidar system includes a photonic chip having an aperture, one or more photodetectors and a circulator. A transmitted light beam generated within the photonic chip exits the photonic chip via the aperture and a reflected light beam enters the photonic chip via the aperture, the reflected light beam being a reflection of the transmitted light beam from the object. The one or more photodetectors measure the parameter of the object from at least the reflected light beam. The circulator integrated into the photonic chip directs the transmitted light beam toward the aperture and directs the reflected light beam from the aperture to the one or more photodetectors. A navigation system navigates the vehicle with respect to the object based on the parameter of the object.

    CALIBRATION AND ALIGNMENT OF COHERENT LIDAR SYSTEM
    13.
    发明申请
    CALIBRATION AND ALIGNMENT OF COHERENT LIDAR SYSTEM 审中-公开

    公开(公告)号：US20190018121A1

    公开(公告)日：2019-01-17

    申请号：US16017278

    申请日：2018-06-25

    Applicant: GM Global Technology Operations LLC

    Inventor： Keyvan Sayyah ,  Oleg Efimov ,  Pamela R. Patterson ,  Raymond Sarkissian ,  James H. Schaffner ,  Biqin Huang ,  David Hammon

    IPC: G01S7/497 ,  G01S17/93 ,  G01S7/491

    Abstract: A lidar system includes a light source to generate a frequency modulated continuous wave (FMCW) signal, and a waveguide splitter to split the FMCW signal into an output signal and a local oscillator (LO) signal. A transmit coupler provides the output signal for transmission. A receive lens obtains a received signal resulting from reflection of the output signal by a target. A waveguide coupler combines the received signal and the LO signal into a first combined signal and a second combined signal. A first phase modulator and second phase modulator respectively adjust a phase of the first combined signal and the second combined signal to provide a first phase modulated signal and a second phase modulated signal to a first photodetector and a second photodetector. A processor processes a first electrical signal and a second electrical signal from the first and second photodetectors to obtain information about the target.

    PHOTONIC CIRCULATOR FOR A LIDAR DEVICE
    16.
    发明申请
    PHOTONIC CIRCULATOR FOR A LIDAR DEVICE 有权

    公开(公告)号：US20210124048A1

    公开(公告)日：2021-04-29

    申请号：US16814741

    申请日：2020-03-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Keyvan Sayyah ,  Raymond Sarkissian ,  Biqin Huang ,  Shuoqin Wang

    IPC: G01S17/10 ,  G01S7/481 ,  G01S17/931

    Abstract: An integrated photonic circulator is described, an application of which may be deployed on a chip-scale light-detection and ranging (LiDAR) device. The photonic circulator includes a micro-ring resonator waveguide, a heating element, first and second bus waveguides, a magneto-optic substrate, a magneto-optic element, a magnetic ring disposed on a photonic substrate, and a silicon substrate. The first and second bus waveguides are coupled to the micro-ring resonator waveguide, and the micro-ring resonator waveguide is affixed onto a first side of the photonic substrate. The magneto-optic element and the magneto-optic substrate are arranged on the micro-ring resonator waveguide, the magnetic ring is affixed to the magneto-optic substrate, the heating element is affixed to the photonic substrate, the photonic substrate is affixed to the silicon substrate, and the magnetic ring is concentric with the micro-ring resonator.

    APPARATUS AND SYSTEM FOR A LIDAR ANTENNA
    17.
    发明申请
    APPARATUS AND SYSTEM FOR A LIDAR ANTENNA 有权

    公开(公告)号：US20210124025A1

    公开(公告)日：2021-04-29

    申请号：US16814587

    申请日：2020-03-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Raymond Sarkissian ,  Keyvan Sayyah ,  Biqin Huang

    IPC: G01S7/481

    Abstract: An apparatus including a light detection and ranging (LiDAR) antenna of an optical phased array includes a silicon-on-insulator substrate including a silicon wire waveguide embedded within the substrate and a grating layer disposed over the substrate. The grating layer includes a silicon nitride layer coating the silicon-on-insulator substrate and including a plurality of etchings formed in a direction perpendicular to a longitudinal axis of the optical phased array and a silicon oxynitride layer coating the silicon nitride layer and filling the etchings. The etchings are relatively thin in the direction of the longitudinal axis of the optical phased array at a first end of the optical antenna and are relatively thick in the direction of the longitudinal axis at a second end. The etchings gradually increase in thickness between the first end of the optical phased array and the second end of the optical antenna.

    PHOTONIC CIRCULATOR FOR A LIDAR DEVICE
    18.
    发明申请
    PHOTONIC CIRCULATOR FOR A LIDAR DEVICE 有权

    公开(公告)号：US20210124024A1

    公开(公告)日：2021-04-29

    申请号：US16814575

    申请日：2020-03-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Raymond Sarkissian ,  Keyvan Sayyah ,  Biqin Huang ,  Ivan Alvarado ,  Shuoqin Wang

    IPC: G01S7/481 ,  G01S7/4912 ,  G01S7/4911

    Abstract: A photonic circulator deployed on a chip-scale light-detection and ranging (LiDAR) device includes a first arm that includes a first waveguide that is bonded onto a first member at a first bonding region, and a second arm that includes a second waveguide that is bonded onto a second member at a second bonding region. A first thermo-optic phase shifter is arranged on the first member and collocated with the first waveguide, and a second thermo-optic phase shifter is arranged on the second member and collocated with the second waveguide. The magneto-optic material and the first thermo-optic phase shifter of the first member cause a first phase shift in a first light beam travelling through the first waveguide, and the magneto-optic material and the second thermo-optic phase shifter of the second member cause a second phase shift in a second light beam travelling through the second waveguide.

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