公开(公告)号：US11644544B2

公开(公告)日：2023-05-09

申请号：US16814726

申请日：2020-03-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: G01S7/48 ,  G01S7/481 ,  G01S7/4911 ,  G01S7/4912 ,  G01S17/88 ,  G02B6/12 ,  G02B6/122 ,  G01S17/10 ,  G02F1/095 ,  B60R11/00 ,  G02F1/01

CPC classification number: G01S7/4818 ,  G01S7/4813 ,  G01S7/4814 ,  G01S7/4815 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/4911 ,  G01S7/4916 ,  G01S17/10 ,  G01S17/88 ,  G02B6/12004 ,  G02B6/1228 ,  G02F1/0955 ,  B60R11/00 ,  G02B2006/1215 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/12121 ,  G02B2006/12147 ,  G02F1/0147

Abstract: An architecture for a chip-scale optical phased array-based scanning frequency-modulated continuous wave (FMCW) Light-detection and ranging (LiDAR) device is described. The LiDAR device includes a laser, a transmit optical splitter, an optical circulator, photodetectors, and an optical phased array. The laser, the transmit optical splitter, the optical circulator, the photodetectors, and the optical phased array are arranged as a chip-scale package on a single semiconductor substrate. The laser generates a first light beam that is transmitted to the optical phased array aperture via the transmit optical splitter, the optical circulator, and the optical phased array. A fraction of the first light beam is transmitted to the photodetectors via the transmit optical splitter to serve as the optical local oscillator (LO), the aperture of the optical phased array captures a second light beam that is transmitted to the photodetectors via the optical phased array and the optical circulator.

公开(公告)号：US11105900B2

公开(公告)日：2021-08-31

申请号：US16059473

申请日：2018-08-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Keyvan Sayyah ,  Pamela R. Patterson ,  Raymond Sarkissian ,  Richard Kremer ,  Oleg Efimov

IPC: G01S7/48 ,  G01S7/481 ,  G02B26/08 ,  G01S17/34

Abstract: A chip-scale LIDAR (light detection and ranging) system, optical package and LIDAR platform. The system includes a photonic chip, a laser associated with the photonic chip, an optical circulator, and a MEMS scanner. The laser, the optical circulator and the MEMS scanner are collinear. The photonic chip includes an edge coupler. The optical package includes a housing having an aperture, and a platform within the housing. The platform includes the laser, an optical circulator, and MEMS scanner.

公开(公告)号：US11067670B2

公开(公告)日：2021-07-20

申请号：US16020202

申请日：2018-06-27

Applicant: GM Global Technology Operations LLC

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

IPC: G01S7/481 ,  G01S17/93 ,  G01S7/491 ,  G01S7/4911 ,  G01S17/58 ,  G01S17/42 ,  G01S17/34 ,  G01S17/86 ,  G01S17/931 ,  G01S7/499 ,  G01S17/02 ,  G02B6/122 ,  G02B6/27 ,  G02B6/42 ,  H01L23/544 ,  H01L31/0232 ,  H01L31/16 ,  G01S17/00 ,  G01S17/32 ,  G01S7/4914 ,  G01S7/497 ,  B81B7/02 ,  G02B27/30 ,  H01S5/125 ,  G01S7/4913 ,  G02B6/00

Abstract: A lidar system includes a photonic chip including a light source and a transmit beam coupler to provide an output signal for transmission. The output signal is a frequency modulated continuous wave (FMCW) signal. A transmit beam steering device transmits the output signal from the transmit beam coupler of the photonic chip. A receive beam steering device obtains a reflection of the output signal by a target and provides the reflection as a received signal to a receive beam coupler of the photonic chip. The photonic chip, the transmit beam steering device, and the receive beam steering device are heterogeneously integrated into an optical engine.

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.

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.

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.

公开(公告)号：US20200088884A1

公开(公告)日：2020-03-19

申请号：US16554090

申请日：2019-08-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Keyvan Sayyah ,  Oleg Efimov ,  Biqin Huang ,  Raymond Sarkissian ,  James H. Schaffner ,  David Hammon ,  Richard Kremer ,  Timothy J. Talty ,  Michael Mulqueen ,  Pamela R. Patterson

IPC: G01S17/93 ,  G01S7/48 ,  G01S7/481 ,  G01S17/32

Abstract: A vehicle, Lidar system and method of detecting an object is disclosed. The Lidar system includes a photonic chip, and a laser integrated into the photonic chip. The laser has a front facet located at a first aperture of the photonic chip to direct a transmitted light beam into free space. A reflected light beam that is a reflection of the transmitted light beam is received at the photonic chip and a parameter of the object is determined from a comparison of the transmitted light beam and the reflected light beam. A navigation system operates the vehicle with respect to the object based on a parameter of the object.

公开(公告)号：US20190018198A1

公开(公告)日：2019-01-17

申请号：US16019686

申请日：2018-06-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Keyvan Sayyah ,  Oleg Efimov ,  Pamela R. Patterson ,  Raymond Sarkissian ,  Biqin Huang

IPC: G02B6/35 ,  G02B6/122 ,  G01S17/02 ,  G01S7/491 ,  G01S7/481

Abstract: A photonic chip, an edge coupler for an integrated photonic system and a method for coupling a laser to the photonic chip. The edge coupler includes a waveguide of the photonic system having a longitudinal axis. The longitudinal axis of a waveguide of the photonic chip is aligned with a longitudinal axis of the laser. The facet of the waveguide facing the laser is at a non-perpendicular angle with respect to the longitudinal axis. Light is transmitted from the laser into the waveguide via the angled facet.

公开(公告)号：US20190018140A1

公开(公告)日：2019-01-17

申请号：US16020214

申请日：2018-06-27

Applicant: GM Global Technology Operations LLC

Inventor： Raymond Sarkissian ,  Keyvan Sayyah

IPC: G01S17/32 ,  G01S7/491 ,  G01S17/93

Abstract: A lidar system includes a laser diode to provide a frequency modulated continuous wave (FMCW) signal, and a current source to provide a drive signal that modulates the laser diode. The current source is controlled to pre-distort the drive signal to provide a linear FMCW signal. The lidar system also includes a splitter to split the FMCW signal into an output signal and a local oscillator (LO) signal, a transmit coupler to transmit the output signal, a receive coupler to obtain a received signal based on reflection of the output signal by a target, and a combiner to combine the received signal with the LO signal into first and second combined signals. A first and second photodetector respectively receive the first and second combined signals and output first and second electrical signals from which a beat signal that indicates the pre-distortion needed for the drive signal is obtained.

公开(公告)号：US20190018120A1

公开(公告)日：2019-01-17

申请号：US16019691

申请日：2018-06-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Oleg Efimov ,  Raymond Sarkissian ,  Keyvan Sayyah ,  David Hammon

IPC: G01S7/499 ,  G02B6/122 ,  G01S7/481 ,  G01S7/491 ,  G02B6/27 ,  G02B6/42 ,  G01S17/02

Abstract: A LIDAR system, optical coupler for a LIDAR system and method of optical communication. The LIDAR system includes an optical coupler having a chip-side face in optical communication with a photonic chip and a scanner-side face in optical communication with a scanner, the optical coupler comprising a polarization rotator and a birefringent wedge. A first beam of light is transmitted from the first location toward a chip-side face of an optical coupler to direct the first beam of light, via the optical coupler, along an optical path at a scanner-side face of the optical coupler. A second beam of light is received along the optical path at the scanner-side face and directed the second beam of light toward a second location.