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.