BPN721: FMCW LiDAR for Distance and Velocity Detection with Large Range and High Resolution


3D imaging sensors have applications that span several industries and markets, from industry metrology, robotic control to autonomous vehicles. Frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR) systems provide high-resolution anti-interference distance and velocity measurements without fast electronics or high optical power but typically require expensive narrow-linewidth lasers with complex feedback circuits. Instead, we report on linearizing the laser chirp by using iterative learning pre-distortion of the laser drive waveform, thus reducing the need for feedback control or expensive tunable laser hardware. We also report on a laser phase noise compensation method to extend the detection range, and experimentally demonstrate a detection range >100 m. With these two methods, long-range FMCW LiDAR with velocity detection capability can be achieved with regular commercial semiconductor lasers and a simple setup. In addition, we report on a large-scale 2-dimensional silicon photonics focal plane switch array with MEMS optical switches for high-speed random-access optical beam steering, which enables an integrated LiDAR system. 

Project ended: 08/25/2021

Publication date: 
January 18, 2021
Publication type: 
BSAC Project Materials (Final/Archive)
PREPUBLICATION DATA - ©University of California 2021

*Only registered BSAC Industrial Members may view project materials & publications. Click here to request member-only access.