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：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.

公开(公告)号：US11579303B2

公开(公告)日：2023-02-14

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: G01S17/931 ,  G01S7/48 ,  G01S17/32 ,  G01S7/481 ,  G05D1/02

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：US11226403B2

公开(公告)日：2022-01-18

申请号：US15957974

申请日：2018-04-20

Applicant: GM Global Technology Operations LLC

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

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

Abstract: A chip-scale coherent lidar system includes a master oscillator integrated on a chip to simultaneously provide a signal for transmission and a local oscillator (LO) signal. The system also includes a beam steering device to direct an output signal obtained from the signal for transmission out of the system, and a combiner on the chip to combine the LO signal and a return signal resulting from a reflection of the output signal by a target. One or more photodetectors obtain a result of interference between the LO signal and the return signal to determine information about the target.

公开(公告)号：US11085998B2

公开(公告)日：2021-08-10

申请号：US16814601

申请日：2020-03-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

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

Abstract: A photonic edge coupler includes a slab waveguide and a ridge waveguide. The ridge waveguide includes a silicon wire waveguide, which includes a tapered portion. A first end of the slab waveguide is joined to the ridge waveguide at a junction, and a second end of the slab waveguide forms a first facet. The ridge waveguide defines a longitudinal axis that is associated with a direction of a light signal therein. The first facet is angled at less than 90 degrees relative to the longitudinal axis associated with the direction of the light signal therein. The first facet is disposed opposite to a laser facet associated with a laser waveguide. The longitudinal axis of the ridge waveguide defines a first center point, and the laser facet and the associated laser waveguide define a second center point. The second center point is laterally offset from the first center point.

公开(公告)号：US20210124118A1

公开(公告)日：2021-04-29

申请号：US16814601

申请日：2020-03-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: G02B6/122 ,  G02B6/12 ,  G01S17/88 ,  G01S7/491

Abstract: A photonic edge coupler includes a slab waveguide and a ridge waveguide. The ridge waveguide includes a silicon wire waveguide, which includes a tapered portion. A first end of the slab waveguide is joined to the ridge waveguide at a junction, and a second end of the slab waveguide forms a first facet. The ridge waveguide defines a longitudinal axis that is associated with a direction of a light signal therein. The first facet is angled at less than 90 degrees relative to the longitudinal axis associated with the direction of the light signal therein. The first facet is disposed opposite to a laser facet associated with a laser waveguide. The longitudinal axis of the ridge waveguide defines a first center point, and the laser facet and the associated laser waveguide define a second center point. The second center point is laterally offset from the first center point.

公开(公告)号：US20190018139A1

公开(公告)日：2019-01-17

申请号：US15957974

申请日：2018-04-20

Applicant: GM Global Technology Operations LLC

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

IPC: G01S17/32 ,  G01S17/93 ,  G01S7/491 ,  G01S7/481 ,  G01S17/00

Abstract: A chip-scale coherent lidar system includes a master oscillator integrated on a chip to simultaneously provide a signal for transmission and a local oscillator (LO) signal. The system also includes a beam steering device to direct an output signal obtained from the signal for transmission out of the system, and a combiner on the chip to combine the LO signal and a return signal resulting from a reflection of the output signal by a target. One or more photodetectors obtain a result of interference between the LO signal and the return signal to determine information about the target.

公开(公告)号：US20190018112A1

公开(公告)日：2019-01-17

申请号：US16018730

申请日：2018-06-26

Applicant: GM Global Technology Operations LLC

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

IPC: G01S7/481 ,  H01L31/16 ,  H01L31/0232 ,  H01L23/544 ,  G01S7/491 ,  G01S17/93

Abstract: A chip-scale coherent lidar system includes a photonic chip that includes a light source, a transmit beam coupler to provide an output signal, and a receive beam coupler to receive a received signal based on a reflection of the output signal by a target. The system also includes a transmit beam steering device to transmit the output signal out of the system, and a receive beam steering device to obtain the received signal into the system. A transmit beam curved mirror reflects the output signal from the transmit beam coupler to the transmit beam steering device. A receive beam curved mirror reflects the received signal from the receive beam steering device to the receive beam coupler. The transmit beam curved mirror and the receive beam curved mirror are formed in a substrate that is heterogeneously integrated with the photonic chip.