光子学报, 2015, 44 (1): 0125003, 网络出版: 2015-01-26
大气背景下盖革模式APD激光雷达探测性能计算
Detection Performance for Laser Radars that Use Geiger-mode APD in Atmosphere Background
光电子 激光雷达 概率统计 探测器 盖革模式APD 探测能力 非合作目标 Optoelectronics Ladar Probability statistics Detectors Geiger-mode APD Detectivity Non-cooperative target
摘要
盖革模式工作的雪崩光电二极管, 以其灵敏度高著称, 广泛应用于天文观测、粒子物理学、激光雷达以及通信领域.但是由于雪崩光电二极管易受到噪音的影响, 特别是在背景光较亮的白天, 背景噪音对探测有很大影响.本文针对白天大气背景噪音的情况, 建立了盖革模式雪崩光电二极管的探测统计模型, 通过设定不同探测器阈值和噪音值进行仿真计算, 分析了探测阈值与噪音对虚警率的影响, 给出了提高最远探测距离的途经与方法.通过限制滤光片带宽、减小探测器开启时间等方法可以将背景噪音光子数减小到2, 在900 km处的探测成功率为96.6%.对雷达散射截面为1 m2的非合作目标, 探测成功率为70%.
Abstract
The Geiger-mode APD is very sensitive. For this advantages, it is widely used for astro-observation, particle physics, LIDAR. Sky background noise is a big problem for Geiger-mode APD detector during the day. The detection statistical model in theory was built, False alarm probability and detection probability and finding the way to increase maximum detection distance in difference detection threshold and background noise were discussed. In difference background noise, the maximum detection distance was determined. By limiting the filter bandwidth or reducing the detector open time, the background noise photon number is reduced to 2. The success rate of detection at 900Km is 96.6%. To the non-cooperative target, when the radar scattering cross section is 1 m2, the success rate of detection is 70%.
苏必达, 王景峰, 马雪松, 张海洋, 华昊, 杨苏辉. 大气背景下盖革模式APD激光雷达探测性能计算[J]. 光子学报, 2015, 44(1): 0125003. SU Bi-da, WANG Jing-feng, MA Xue-song, ZHANG Hai-yang, HUA Hao, YANG Su-hui. Detection Performance for Laser Radars that Use Geiger-mode APD in Atmosphere Background[J]. ACTA PHOTONICA SINICA, 2015, 44(1): 0125003.
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