公开(公告)号：US11796644B2

公开(公告)日：2023-10-24

申请号：US16814587

申请日：2020-03-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Raymond Sarkissian ,  Keyvan Sayyah ,  Biqin Huang

IPC: G02F1/295 ,  G02B6/12 ,  G02B6/26 ,  G02B6/42 ,  G02B6/10 ,  G01S7/481 ,  G01S7/4911 ,  G01S7/4912 ,  G01S17/88 ,  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 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：US11573297B2

公开(公告)日：2023-02-07

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 ,  G05D1/02 ,  G01S17/08 ,  G01S17/931 ,  G02B6/12 ,  G01S17/88 ,  G01S17/04 ,  G01S17/66 ,  G01S17/87

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.

公开(公告)号：US11002832B2

公开(公告)日：2021-05-11

申请号：US16018831

申请日：2018-06-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: G01S7/48 ,  G01S7/481 ,  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 ,  G01S7/491 ,  G01S7/497 ,  B81B7/02 ,  G02B27/30 ,  H01S5/125 ,  G01S7/4913 ,  G02B6/00

Abstract: A LIDAR system, LIDAR chip and method of manufacturing a LIDAR chip. The LIDAR system includes a photonic chip configured to transmit a transmitted light beam and to receive a reflected light beam, a scanner for directing the transmitted light beam towards a direction in space and receiving the reflected light beam from the selected direction, and a fiber-based optical coupler. The photonic chip and the scanner are placed on a semiconductor integrated platform (SIP). The fiber-based optical coupler is placed on top of the photonic chip to optically couple to the photonic chip for directing the a transmitted light beam from the photonic chip to the scanner and for directing a reflected light beam from the scanner to the photonic chip.

公开(公告)号：US10914821B2

公开(公告)日：2021-02-09

申请号：US16017278

申请日：2018-06-25

Applicant: GM Global Technology Operations LLC

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

IPC: G01S7/00 ,  G01S7/481 ,  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 ,  G01S7/491 ,  G01S7/497 ,  B81B7/02 ,  G02B27/30 ,  H01S5/125 ,  G01S7/4913 ,  G02B6/00

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.

公开(公告)号：US20200088845A1

公开(公告)日：2020-03-19

申请号：US16555367

申请日：2019-08-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: G01S7/481 ,  G01S7/491 ,  G01S17/32

Abstract: A Lidar system, photonic chip and method of detecting an object is disclosed. The Lidar system includes the photonic chip. The photonic chip includes a laser and a local oscillator waveguide. The laser is integrated into the photonic chip and generates a leakage energy at a back facet of the laser for use as a local oscillator beam for the photonic chip. The local oscillator waveguide receives the leakage energy as the local oscillator beam. The laser further generates a transmitted light beam through a front facet of the photonic chip, combining the leakage energy with a reflection of the transmitted light beam form an object, and detects a combination of the reflected light beam and the leakage energy to determine a parameter of the object.