Invention Grant
- Patent Title: Lidar system with integrated frequency shifter for true doppler detection
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Application No.: US16554866Application Date: 2019-08-29
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Publication No.: US11579294B2Publication Date: 2023-02-14
- Inventor: Timothy J. Talty , Keyvan Sayyah , Michael Mulqueen , Richard Kremer
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Cantor Colburn LLP
- Main IPC: G01S7/00
- IPC: G01S7/00 ; G01S17/42 ; G01S7/486 ; G01S7/48 ; G01S7/484 ; G01S17/931

Abstract:
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.
Public/Granted literature
- US20200088878A1 LIDAR SYSTEM WITH INTEGRATED FREQUENCY SHIFTER FOR TRUE DOPPLER DETECTION Public/Granted day:2020-03-19
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