单光子测距雷达系统的强光感生噪声影响探究  

Study of Signal-Induced Noise in Single-Photon Ranging Lidar Systems

作　　者：涂云波 刘夏林 强佳[1] 舒嵘[1,2] Tu Yunbo;Liu Xialin;Qiang Jia;Shu Rong(Key Laboratory of Space Active Optical-Electro Technology,Shanghai Institute of Technical physics,Chinese Academy of Sciences,Shanghai 200083,China;School of Information Science and Technology,Shanghai Tech University,Shanghai 201210,China)

机构地区：[1]中国科学院上海技术物理研究所空间主动光电技术重点实验室,上海200083 [2]上海科技大学信息科学与技术学院,上海201210

出　　处：《激光与光电子学进展》2024年第4期446-453,共8页Laser & Optoelectronics Progress

基　　金：基础研究特区计划(JCYJ-SHFY-2021-04)。

摘　　要：对于单光子测距雷达系统而言,发射激光脉冲瞬间和近场强后向散射带来的强背景光噪声信号均会导致光电倍增管产生强光感生噪声(SIN),严重影响后续目标的探测。为精确标定单光子量级的SIN,基于自主研制的单光子测距回波模拟器和固定脉宽为10 ns的脉冲激光器搭建了一套完备的SIN检测与评估平台。测量了不同能量的强背景光条件下的SIN,并使用相关经验公式对噪声进行了拟合。结合实际测距雷达系统,为满足百公里级测距目标反演的信噪比要求,应控制到达探测器处近场强背景光能量小于100 pJ。该研究为单光子测距激光雷达系统的性能评估提供了重要参考。For the single-photon ranging lidar system,the strong background light from both the emitted laser instantaneously and the backscattering of the near field will cause the photomultiplier to generate signal-induced noise(SIN),which seriously affects the detection of subsequent targets.In order to accurately calibrate the SIN at the singlephoton level,a complete SIN detection and evaluation platform is built based on a self-developed single-photon ranging echo simulator and a pulsed laser with a fixed width of 10 ns.The induced noise under strong background light of different energy has been measured,and is also fitted using the relevant empirical formulas.According to the actual ranging system,the background light energy received at the detector should be less than 100 pJ in order to meet the signal-to-noise ratio requirement of 100 km-level ranging target inversion.This research provides an important reference for the performance evaluation of the single-photon ranging lidar system.

关 键 词：遥感与传感器 单光子测距 强光感生噪声 光电倍增管 回波模拟器 

分 类 号：O436[机械工程—光学工程]