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    TECHNIQUES FOR PHOTONICS INPUT/OUTPUT COUPLERS FOR FMCW LIDAR
    2.
    发明申请
    TECHNIQUES FOR PHOTONICS INPUT/OUTPUT COUPLERS FOR FMCW LIDAR 有权

    公开(公告)号：US20240410984A1

    公开(公告)日：2024-12-12

    申请号：US18207370

    申请日：2023-06-08

    Applicant: AEVA, INC.

    Inventor： Behsan Behzadi ,  Bing Shen

    IPC: G01S7/481 ,  G01S17/32 ,  G02B6/42

    Abstract: A photonics grating coupler to transmit light in a light detection and ranging (LiDAR) system includes a receiver component adapted to receive light transmitted from an optical source. The photonics grating coupler includes a plurality of light scattering elements arranged in a rectangular pattern, wherein the plurality of light scattering elements comprises a first set of light scattering elements, each light scattering element comprising a first cross section and a first duty cycle and adapted to receive the light from the receiver to produce reflected light. The photonics grating coupler also includes a second set of light scattering elements, each light scattering element comprising a second cross section and a second duty cycle and adapted to transmit the reflected light towards a waveguide coupled to receive the reflected light.

    Techniques for on-chip polarization management using polarizing waveguides
    4.
    发明授权
    Techniques for on-chip polarization management using polarizing waveguides 有权

    公开(公告)号：US11061123B1

    公开(公告)日：2021-07-13

    申请号：US17221694

    申请日：2021-04-02

    Applicant: AEVA, INC.

    Inventor： Bing Shen ,  Kevin Masuda ,  Brett E. Huff ,  Pradeep Srinivasan

    IPC: G01S7/499 ,  G02B27/28 ,  G02B6/126 ,  G01S17/06 ,  G02B6/122 ,  G02B6/12

    Abstract: A LiDAR system includes an optical source to emit an optical beam and a PSR a silicon nitride based waveguide to split and rotate an optical beam. The silicon nitride based waveguide includes a first silicon nitride segment including a first layer and a second layer, the first silicon nitride segment having tapered widths along a longitudinal direction. The second layer includes a first section extending from a first end of the first silicon nitride segment to a converging plane with increasing widths and a second section extending from the converging plane to a second end of the first silicon nitride segment with decreasing widths. The LIDAR system further includes an optical element to generate a local oscillator (LO) signal and an optical detector to mix the target return signal with the LO signal to generate a heterodyne signal to extract range and velocity information of the target.

    Techniques for on-chip polarization management
    5.
    发明授权
    Techniques for on-chip polarization management 有权

    公开(公告)号：US10983200B1

    公开(公告)日：2021-04-20

    申请号：US17129061

    申请日：2020-12-21

    Applicant: AEVA, INC.

    Inventor： Bing Shen ,  Kevin Masuda ,  Brett E. Huff ,  Pradeep Srinivasan

    IPC: G02B27/28 ,  G02B6/126 ,  G02B6/122 ,  G02B6/12 ,  G01S7/499 ,  G01S17/06

    Abstract: A light detection and ranging (LiDAR) system according to the present disclosure comprises an optical source to emit an optical beam. The LiDAR system comprises a PSR comprising a silicon nitride based waveguide to split and rotate a target return signal of the optical beam from a target. The silicon nitride based waveguide includes a first silicon nitride segment and a second silicon nitride segment. The first silicon nitride segment includes a first layer and a second layer. The first silicon nitride segment has tapered widths along a longitudinal direction. The second silicon nitride segment includes a silicon nitride adiabatic coupler. The LiDAR system further comprises an optical element to generate a local oscillator (LO) signal and a PD to mix the target return signal with the LO signal to generate a heterodyne signal to extract information of the target.

    TECHNIQUES FOR A FREE SPACE SILICON PHOTONICS RECEIVER FOR FMCW LIDAR
    6.
    发明申请
    TECHNIQUES FOR A FREE SPACE SILICON PHOTONICS RECEIVER FOR FMCW LIDAR 有权

    公开(公告)号：US20240410999A1

    公开(公告)日：2024-12-12

    申请号：US18207384

    申请日：2023-06-08

    Applicant: AEVA, INC.

    Inventor： Ryan Going ,  Bing Shen ,  Pradeep Srinivasan

    IPC: G01S7/4915 ,  G01S7/481 ,  G01S17/58

    Abstract: A frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR) system includes an optical source to direct optical beams towards a target object, and a plurality of return signals are returned to the LiDAR system. The LiDAR system includes a reflective optical component to return a portion of the plurality of optical beams along a return path as a local oscillator (LO) signal, a rotating scanning mirror between the optical source and the target object, and a plurality of optical detectors. The plurality of optical detectors receives and consumes the plurality of return signals. The LiDAR system also includes an optical circuit implemented on a photonics chip that include a plurality of photonics couplers. The plurality of photonics couplers produces a plurality of outputs that are combined by the optical circuit. A signal processing system consumes the outputs.

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