红外与毫米波学报2018，Vol.37Issue(3)：378-384,7.DOI:10.11972/j.issn.1001-9014.2018.03.019
基于SNSPD与SPAD探测器的激光测距系统的 比较研究
Comparison of laser ranging system based on SNSPD and SPAD detectors
摘要
Abstract
The laser ranging systems based on SNSPD and SPAD detectors are compared by experi-ments.In the experiments, the sky light background can be ignored when the receive echo is attenuated to 120 dB, the detection probability of SPAD is less than 0.2％, while the detection probability of SNSPD is 35％.When the laser emission frequency is below 1 kHz, the detection probability of SNSPD is more than 60％higher than that of SPAD.The study shows that the detection performance of SNSPD is much better than that of SPAD when detecting the weak signal echo photons.The reason is that SNSPD has lower dark counts and higher detection probability.At the same time, with no atten-uation at the receiving end, the sky light background will bring dark counts, affecting the signal-to-noise ratio of the ranging system.Simulation analysis shows that the signal-to-noise ratio of the SNSPD-based laser ranging system is lower than 6 when the background luminance is higher than 30 W/( m2 · sr) , which may affect the stability detection of the laser ranging system.关键词
超导纳米线单光子探测器/激光测距/光子计数/暗计数/天光背景Key words
superconducting nanowire single photon detector/laser ranging/photon counting/dark count/skylight background分类
化学化工引用本文复制引用
张晓英,贾磊,朱江,闫夏超,张蜡宝,康琳,吴培亨..基于SNSPD与SPAD探测器的激光测距系统的 比较研究[J].红外与毫米波学报,2018,37(3):378-384,7.基金项目
国家重点研发计划(2017Y7-A030400),国家自然科学基金(11227904,61471189,61571217和61521001) Supported by National key R&D Program of China (2017Y7-A030400), National Natural Science Foundation of China (11227904, 61471189,61571217,61521001) （2017Y7-A030400）
