单光子计数探测系统的线性性能研究  

Research on the linearity of the single photon counting detection system

作　　者：彭如意[1,2] 王天放[1] 贾楠[1] 李宇嘉[1,2] 付利平[1] PENG Ruyi WANG Tianfang JIA Nan LI Yujia Fu Liping(National Space Science Center, Chinese Academy of Sciences, Bejing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《光学技术》2017年第2期180-183,共4页Optical Technique

摘　　要：利用单光子计数技术对微弱光进行探测具有与其他模拟法相比的多个优势,如有好的抗漂移性、高的信噪比、较宽的线性区等。线性性能是探测器的基本性能之一,利用叠加法和距离平方反比法测量单光子计数探测系统的线性范围,当非线性因子为0.05时,利用叠加法实验测得系统线性响应计数率为3.9×10~5 Counts/s,利用距离平方反比法实验测得系统线性响应计数率为5×10~5 Counts/s。结果表明,两种方法测得响应线性度一致性较好。分析了电子学系统的漏计误差对探测器系统线性范围的影响。实验表明,通过缩短电子学系统中甄别器的死区时间(td)可以提高系统的线性范围。Using single photon counting technology for weak light detection has many advantages compared with oth- er simulation method, such as good anti-drift, high SNR, wide linear range, etc. Linear performance is one of the basic per- formance of the detector. By using the superposition method, when the nonlinearity is 5%, the single photon counting de- tection system achieves a count rate of 3.9 ×10^5 Counts/s, while the system achieves a count rate of 5×10^5 Counts/s by u- sing the inverse distance square method. The results show that this two methods achieve high consistency in the measure- ment of the system＇s linearity. The influence of the omission counting error of the electronics system on the linearity is analyzed, The test result shows that the linearity of the single photon counting system can be improved by shortening the dead time（td） of the discriminator which is one part of the electronics system.

关 键 词：光学测量 微弱光探测 单光子计数 线性 叠加法 距离平方反比法 

分 类 号：O463[机械工程—光学工程]