面向MEMS振镜激光雷达系统的近程接收机设计  

Design of short-range LiDAR receiver based on MEMS mirror

作　　者：万岁岁 庞亚军 薛瑞祥 白振旭 Wan Suisui;Pang Yajun;Xue Ruixiang;Bai Zhenxu(Center for Advanced Laser Technology,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Advanced Laser Technology and Equipment,Tianjin 300401,China)

机构地区：[1]河北工业大学先进激光技术研究中心,天津300401 [2]河北省先进激光技术与装备重点实验室,天津300401

出　　处：《光电工程》2024年第3期116-127,共12页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(61905063);河北省自然科学基金资助项目(F2020202055)。

摘　　要：针对1550 nm波段铟镓砷探测器小光敏面无法有效接收MEMS较大扫描视场回波的问题,设计了一种适用于近程宽视场的接收装置。接收端光学系统利用像方远心结构作为接收天线,通过仿真在1 mm的光敏面下实现了36°的接收视场,整体相对照度超过95%,集光性能和通光性能较好。同时,接收电路采用T型网络放大结构,结合时刻鉴别电路,利用TDC7200实现高精度时间测量。实验结果表明,飞行时间测量精度在200 ns量程下小于120 ps,在8 m范围内测距精度优于2 ns,能够满足近程探测的需要。To address the ineffective reception of larger scanning field echoes by the small photosensitive area of the indium gallium arsenide InGaAs detector in the 1550 nm wavelength band,a receiver device suitable for near-range wide field-of-view applications has been designed.The optical system at the receiving end utilizes an afocal telecentric structure as the receiving antenna,achieving a reception field-of-view of 36°at a photosensitive area of 1 mm.The relative illuminance exceeds 95%,demonstrating excellent light collection and transmission characteristics.Additionally,the receiver circuit adopts a T-network amplification structure combined with a moment identification circuit,utilizing the TDC7200 to achieve high-precision time measurements.The flight time measurement accuracy is less than 120 ps within a range of 200 ns,and the experimental results demonstrate ranging accuracy better than 2 ns within an 8 m distance,meeting the requirements for near-range detection.

关 键 词：微机电系统 大视场 光学设计 近程探测 

分 类 号：TN274[电子电信—物理电子学]