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公开(公告)号：US11639988B2
公开(公告)日：2023-05-02
申请号：US16814741
申请日：2020-03-10
发明人： Keyvan Sayyah , Raymond Sarkissian , Biqin Huang , Shuoqin Wang
IPC分类号： G01S7/481 , G01S7/4911 , G01S7/4912 , G01S17/88 , G02B6/12 , G02B6/122 , G01S17/10 , G02F1/095 , B60R11/00 , G02F1/01
摘要： 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.
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公开(公告)号：US11500072B2
公开(公告)日：2022-11-15
申请号：US16814575
申请日：2020-03-10
发明人： Raymond Sarkissian , Keyvan Sayyah , Biqin Huang , Ivan Alvarado , Shuoqin Wang
IPC分类号： G01S7/481 , G01S7/4911 , G01S7/4912 , G01S17/88 , G02B6/12 , G02B6/122 , G01S17/10 , B60R11/00
摘要： 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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公开(公告)号：US11092671B2
公开(公告)日：2021-08-17
申请号：US16020214
申请日：2018-06-27
发明人： Raymond Sarkissian , Keyvan Sayyah
IPC分类号： G01S17/32 , G01S17/93 , G01S7/491 , 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 , G01S7/4914 , G01S7/497 , B81B7/02 , G02B27/30 , H01S5/125 , G01S7/4913 , G02B6/00
摘要： 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.
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公开(公告)号：US20210124031A1
公开(公告)日：2021-04-29
申请号：US16814726
申请日：2020-03-10
发明人： Raymond Sarkissian , Keyvan Sayyah , Shuoqin Wang , Biqin Huang , Ivan Alvarado
IPC分类号： G01S7/4911 , G01S7/481 , G01S17/931
摘要： 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.
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5.发明授权公开(公告)号：US10976414B2
公开(公告)日：2021-04-13
申请号：US16018730
申请日：2018-06-26
发明人： Keyvan Sayyah , Oleg Efimov , Pamela Patterson , Raymond Sarkissian , James H. Schaffner , Biqin Huang , David Hammon
IPC分类号： 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
摘要： 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.
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公开(公告)号：US20200088878A1
公开(公告)日：2020-03-19
申请号：US16554866
申请日：2019-08-29
摘要： A vehicle, Lidar system and method of detecting an object is disclosed. The Lidar system includes a photonic chip having a laser, an on-chip frequency shifter, a combiner and a first set of photodetectors. The laser generates a transmitted light beam and an associated local oscillator beam within the photonic chip. The on-chip frequency shifter shifts a frequency of the local oscillator beam. The combiner combines a reflected light beam with the frequency-shifted local oscillator beam, wherein the reflected light beam is a reflection of the transmitted light beam from the object to generate a first electronic signal at the first set of photodetectors. A processor obtains a first measurement of a parameter of the object from the first electronic signal. The vehicle includes a navigation system for navigating the vehicle with respect to the object using at least the first measurement of the parameter.
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公开(公告)号：US20190018121A1
公开(公告)日：2019-01-17
申请号：US16017278
申请日：2018-06-25
发明人： Keyvan Sayyah , Oleg Efimov , Pamela R. Patterson , Raymond Sarkissian , James H. Schaffner , Biqin Huang , David Hammon
摘要： 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.
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公开(公告)号：US20190018110A1
公开(公告)日：2019-01-17
申请号：US16018716
申请日：2018-06-26
发明人： Richard Kremer , Keyvan Sayyah
摘要： A chip-scale lidar system includes a first light source to output a first signal, and a second light source to output a second signal. A transmit beam coupler provides an output signal for transmission that includes a portion of the first signal and a portion of the second signal, and receive beam coupler obtains a received signal resulting from reflection of the output signal by a target. The system includes a first and second set of photodetectors to obtain a first and second set of electrical currents from a first and second set of combined signals including a first and second portion of the received signal. A processor obtains Doppler information about the target from the second set of electrical currents and obtains range information about the target from the first set of electrical currents and the second set of electrical currents.
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公开(公告)号：US10564263B2
公开(公告)日：2020-02-18
申请号：US16019691
申请日：2018-06-27
发明人： Oleg Efimov , Raymond Sarkissian , Keyvan Sayyah , David Hammon
IPC分类号： G01S7/491 , G02B6/27 , G02B6/42 , G01S17/02 , G01S7/481 , G01S7/4911 , G01S17/58 , G01S17/93 , H01L23/544 , H01L31/0232 , H01L31/16 , G01S17/00 , G01S17/32 , G01S7/4914 , G01S7/497 , B81B7/02 , G02B27/30 , H01S5/125 , G01S7/4913
摘要： 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.
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公开(公告)号：US20200049801A1
公开(公告)日：2020-02-13
申请号：US16059473
申请日：2018-08-09
摘要： 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.
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