基于高速单光子探测的光时域反射测量  

Optical time domain reflectometer based on high-speed single-photon detection

作　　者：倪文进[1] 陈杰[1] 梁焰[1] 曾和平[1,2] 

机构地区：[1]上海理工大学光电信息与计算机工程学院 [2]华东师范大学精密光谱科学与技术国家重点实验室

出　　处：《红外与毫米波学报》2017年第2期196-201,共6页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(11404212;11604209);中国博士后科学基金(2014M560347)~~

摘　　要：针对传统光时域反射仪(OTDR)激光出射功率高、累计时间长、测量分辨率低的问题,提出了将高速InGaAs/InP雪崩光电二极管单光子探测器应用于光时域反射测量的方法.单光子探测器的工作重复频率为1 GHz,可实现"准连续"探测,无需扫频即可快速捕获单光子水平的回返光信号并输出.该方法实现了出射光脉冲宽度为50 ps、峰值功率为10 mW,测量距离为50 km,距离精度小于10 cm,且事件盲区小于1 m的光时域反射测量.Conventional optical time domain reflectometer （OTDR） not only requires high-power laser output and long cumulative time but also exhibites low resolution. To solve the problem this paper pro- poses an OTDR with a high-speed single-photon detector based on InGaAs/InP avalanche photodiode. The working repetition frequency of this single-photon detector was 1 GHz, achieving ＂ quasi-continu- ous＂ detection, realizing quick capture of return signal at single-photon level without scanning. With the emitting pulsed laser of 50 ps pulse width and 10 mW peak power, this OTDR whose event dead zone is less than 1 m, could obtain the longest measuring distance of 50 km with 10 cm accuracy.

关 键 词：单光子探测器 光时域反射 准连续 

分 类 号：TN247[电子电信—物理电子学]