SiPM激光雷达阳光下探测概率性能分析  

Analysis of detection probability performance of SiPM LiDAR under sunlight

作　　者：陈建光 倪旭翔[1] 袁波[1] 严惠民[1] Chen Jianguang;Ni Xuxiang;Yuan Bo;Yan Huimin(School of Optoelectronics Science and Engineering,Zhejiang University,Zhejiang,Hangzhou 310027,China)

机构地区：[1]浙江大学光电科学与工程学院,浙江杭州310027

出　　处：《光电工程》2021年第10期29-38,共10页Opto-Electronic Engineering

基　　金：2016国家重点研发计划课题“支持云端融合的手部和全身运动捕捉技术与设备”(2016YFB1001302)。

摘　　要：硅基光电倍增管(SiPM)是由数百乃至数千单光子雪崩二极管(SPAD)组成的阵列,它具有增益高、易于集成到阵列以及抗干扰等优点,在激光雷达测距方面具有广泛的应用前景。本文分析了激光雷达测距中的信号和噪声模型,仿真计算了阳光下的SiPM模拟输出,通过高斯拟合得到相应的均值,并在SPAD接收光子受激发概率服从泊松分布的基础上,给出了背景光电子数在0.001个/ns~0.01个/ns,探测器死时间在5 ns~50 ns范围内受背景光影响的SiPM模拟输出计算公式,推导了目标探测概率表达式。在室外环境光下进行的激光测距探测概率实验结果与理论计算值相吻合。Silicon photomultiplier(SiPM)is an array composed of hundreds or even thousands of single photon avalanche diode(SPAD).It has the advantages of high gain,easy integration into the array and anti-interference,and has a wide range of application prospects in LiDAR ranging.We analyzed the laser radar ranging signal and noise model,simulated the output of SiPM under sunlight,and obtained the corresponding mean value through Gaussian fitting.On the basis that the probability of being excited after SPAD received photons obeys the Poisson distribution,the calculation formula of SiPM analog output affected by background light when the background pho-toelectron is 0.001/ns~0.01/ns and the detector dead time is 5 ns~50 ns was given.Finally,we derived the ex-pression of target detection probability.The experimental results of laser ranging detection probability under outdoor ambient light are consistent with theoretical calculations.

关 键 词：硅基光电倍增管 背景光 死时间 激光测距 探测概率 

分 类 号：TN364.2[电子电信—物理电子学]