基于双重复频率的光时域反射仪  

Optical time domain reflectometer based on dual repetition rates

作　　者：黄仁贵 陈杰[1] 梁焰[1] 沈旭玲 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,上海200093 [2]华东师范大学精密光谱科学与技术国家重点实验室,上海200062

出　　处：《红外与毫米波学报》2017年第6期727-731,738,共6页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(11404212;11604209)~~

摘　　要：提出并实现一种基于InGaAs/InP雪崩光电二极管单光子探测器的双重复频率光时域反射仪系统.通过发送两列重复频率有差异的脉冲激光信号对同一光纤的断点进行检测.接收系统采用高速单光子探测器,保证了回返光探测灵敏度,同时也提高了数据采样的速度.通过调节两列激光脉冲重复频率,不仅可以实现系统测量距离量程的改变,而且能够改变测量精度.An optical time domain reflectometer with dual repetition rates was proposed based on the single photon detector with InGaAs/InP avalanche photodiode. Two arrays of laser pulses with slight different repetition rates were injected into the fiber to monitor the fiber broken point. A fast single photon detector was adopted for high sensitivity in reflected pulses detection with reduced measurement time.By adjusting the difference of the repetition rates,not only the measuring range of the system can be extended,but also the measurement accuracy can be changed.

关 键 词：光时域反射仪 双重复频率 单光子探测器 

分 类 号：TN247[电子电信—物理电子学]