Dissertation Talk: Realization of Integrated Coherent LiDAR
Seminar: Dissertation Talk: EE | May 8 | 4-5 p.m. | Cory Hall, 490H (Immersion Room in Swarm Lab)
Taehwan Kim, UC Berkeley
LiDAR (Light Detection and Ranging) captures high-definition real-time 3D images of the surrounding environment, which makes it a crucial sensing modality for applications such as self-driving cars. However, high price tag of existing commercial LiDAR modules based on mechanical beam scanners and intensity-based detection scheme prohibits them from being extensively applied to consumer products. In this talk, our research effort to dramatically bring down the cost of a LiDAR module leveraging the state-of-the-art silicon photonics-CMOS 3D heterogeneous integration technology is presented. Our system includes large-scale optical phased arrays for beam formation and an optical coherent detection frontend for FMCW LiDAR signal detection, realizing a complete LiDAR system fully integrated on a single chip which can be fabricated through a 300mm wafer facility. In addition, I will also explain potential issues associated with the FMCW laser source, and present some of the techniques to tackle them using circuit-level techniques.