量子通信中单光子探测器的实验研究  

Single photon detection used in quantum communication

作　　者：韩宇宏[1] 杨树[1] 马海强[1] 

机构地区：[1]北京邮电大学理学院,北京100876

出　　处：《应用光学》2010年第2期322-326,共5页Journal of Applied Optics

基　　金：国家重点基础研究发展计划项目(2010CB923202);国家自然科学基金项目(10875018)

摘　　要：为了提高单光子探测系统的灵敏度,实验采用InGaAs/InP雪崩光电二极管作为量子通信中的单光子探测器件,以门控脉冲模式实现了更高精度的单光子探测器的偏压生成电路、单光子信号放大电路、单光子信号检测电路和温度控制模块,并通过选用高精度前置放大器OP37和精密比较器AD8561,将量子效率提高到18.3%,暗计数控制小于4.1%×10-6/ns。In order to improve the sensitivity of single-photon detection systems, InGaAs/InP avalanche photodiode （InGaAs/InP APD） is used in the design of single photon detector of quantum communication. Single photon detector bias generation circuit in gate pulse mode, single-photon signal amplification circuit, single photon signal detection circuit and temperature control module were realized. By selecting high-precision OP37 preamplifier and precision comparator AD8561, quantum efficiency was increased to 18. 3%, dark count was controlled within 4.1 × 10^-6/ns.

关 键 词：单光子探测 门脉冲模式 雪崩光电二极管 量子通信 

分 类 号：TN911.74[电子电信—通信与信息系统] O431[电子电信—信息与通信工程]