透镜辅助的集成收发调频连续波激光雷达

Lens-Assisted Frequency Modulated Continuous Wave Lidar Based on Integrated Transceiver

基于单片集成收发芯片搭建了一个透镜辅助光束扫描的激光雷达系统。基于硅基集成技术设计了一个单片集成收发芯片,片上集成了一个1×4的光开关以及2×2的收发器阵列。收发器由中间的一个光栅发射器以及周围的U形光电探测器构成。实验证明,光开关具有5.4μs左右的响应时间,收发器具有0.3 A/W的光电流响应。结合研制的具有300 ns响应时间的扫描电控装置,搭建了调频连续波激光雷达系统,并在1 m范围内进行了测距实验。

Based on a monolithic transceiver chip,a lens-assisted beam scanning lidar system is built.The monolithic transceiver chip is fabricated based on silicon-based integration technology,which integrates a 1×4 optical switch and 2×2 transceiver array.The transceiver consists of a grating transmitter in the middle and a surrounding U-shaped photodetector.The experimental results show that the response time of optical switch is about 5.4μs,and the photocurrent response of the transceiver is 0.3 A/W.Combined with our self-developed scanning electronic control device with the response time of 300 ns,a frequency modulated continuous wave lidar system is realized,and the ranging experiment is carried out in the range of 1 m.