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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11092671 B1

PDFFull Text
Date of Patent:
Aug. 17, 2021

Filed:

Jun. 27, 2018

Laser diode optical frequency modulation linearization algorithm

Applicant:

GM Global Technology Operations Llc, Detroit, MI (US);

Inventors:

Raymond Sarkissian, Studio City, CA (US);

Keyvan Sayyah, Santa Monica, CA (US);

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);

Attorney:

Cantor Colburn LLP

Primary Examiner:

Daniel L Murphy

Int. Cl.
CPC ...
G01S 17/32 (2020.01); G01S 17/93 (2020.01); G01S 7/491 (2020.01); G01S 7/481 (2006.01); G01S 7/4911 (2020.01); G01S 17/58 (2006.01); G01S 17/42 (2006.01); G01S 17/34 (2020.01); G01S 17/86 (2020.01); G01S 17/931 (2020.01); G01S 7/499 (2006.01); G01S 17/02 (2020.01); G02B 6/122 (2006.01); G02B 6/27 (2006.01); G02B 6/42 (2006.01); H01L 23/544 (2006.01); H01L 31/0232 (2014.01); H01L 31/16 (2006.01); G01S 17/00 (2020.01); G01S 7/4914 (2020.01); G01S 7/497 (2006.01); B81B 7/02 (2006.01); G02B 27/30 (2006.01); H01S 5/125 (2006.01); G01S 7/4913 (2020.01); G02B 6/00 (2006.01);
U.S. Cl.
CPC ...
G01S 7/4815 (2013.01); B81B 7/02 (2013.01); G01S 7/4816 (2013.01); G01S 7/4817 (2013.01); G01S 7/4818 (2013.01); G01S 7/491 (2013.01); G01S 7/499 (2013.01); G01S 7/4911 (2013.01); G01S 7/4913 (2013.01); G01S 7/4914 (2013.01); G01S 7/4972 (2013.01); G01S 17/003 (2013.01); G01S 17/02 (2013.01); G01S 17/32 (2013.01); G01S 17/34 (2020.01); G01S 17/42 (2013.01); G01S 17/58 (2013.01); G01S 17/86 (2020.01); G01S 17/931 (2020.01); G02B 6/122 (2013.01); G02B 6/2766 (2013.01); G02B 6/4209 (2013.01); G02B 27/30 (2013.01); H01L 23/544 (2013.01); H01L 31/02327 (2013.01); H01L 31/16 (2013.01); H01S 5/125 (2013.01); B81B 2207/03 (2013.01); G02B 2006/0098 (2013.01); H01L 2223/54426 (2013.01); H01L 2223/54486 (2013.01);
Abstract

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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