红外与毫米波学报, 2017, 36 (2): 196, 网络出版: 2017-06-06
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
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.
Abstract
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 proposes 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-continuous" 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.
倪文进, 陈杰, 梁焰, 曾和平. 基于高速单光子探测的光时域反射测量[J]. 红外与毫米波学报, 2017, 36(2): 196. NI Wen-Jin, CHEN Jie, LIANG Yan, ZENG He-Ping. Optical time domain reflectometer based on high-speed single-photon detection[J]. Journal of Infrared and Millimeter Waves, 2017, 36(2): 196.