基于集成收发器阵列的单片相干光探测和测距系统

Monolithic coherent LABS lidar based on an integrated transceiver array.

作者信息

Li Chao, Wu Kan, Cao Xianyi, Zhang Guangjin, Li Tianyi, Deng Zheng, Chang Mingchao, Wang Yanan, Li Xinwan, Chen Jianping

出版信息

Opt Lett. 2022 Jun 1;47(11):2907-2910. doi: 10.1364/OL.453201.

DOI:10.1364/OL.453201

PMID:35648961

Abstract

We demonstrate a monolithic frequency-modulated continuous-wave (FMCW) lidar chip with an integrated transceiver array based on lens-assisted beam steering (LABS) technology. It enables beam emitting, steering, receiving, and coherent detecting on a single chip with simultaneous distance and velocity detection. An integrated transceiver is designed with a composite structure of a Bragg grating in the middle and a U-shaped photodetector (PD) surrounding it. For a proof-of-concept demonstration, a chip with 2 × 2 switchable transceiver array is fabricated. A monolithic coherent LABS lidar system with a scanning angle of 2.86° and a scanning speed of 5.3 µs is implemented for 5 m ranging and 0.45 m/s velocity detection.

摘要

我们展示了一种基于透镜辅助光束转向（LABS）技术的具有集成收发器阵列的单片调频连续波（FMCW）激光雷达芯片。它能够在单个芯片上实现光束发射、转向、接收和相干检测，同时进行距离和速度检测。集成收发器采用中间为布拉格光栅、周围为U形光电探测器（PD）的复合结构设计。为了进行概念验证演示，制造了一个具有2×2可切换收发器阵列的芯片。实现了一个扫描角度为2.86°、扫描速度为5.3微秒的单片相干LABS激光雷达系统，用于5米测距和0.45米/秒的速度检测。