摘要
介绍了基于模间干涉的全光纤电压传感器结构及原理,利用两个光电二极管探测双模光纤输出的相干模斑光强,通过模斑光强的变化测量待测电压引起的模间相位差变化,讨论了含源零差检测法的相位跟踪原理,给出了相位检测系统及电路,仿真和实验结果表明此设计方案能达到相位跟踪的目的。
An all-fiber voltage sensor based on inter-mode interference is introduced. The coherent mode-spot light intensity which comes from dual-mode fiber is detected by two diodes. The inter-mode phase difference change caused by the measured voltage is measured from the change of mode-spot light intensity. The principle of phase tracking of the system with source-contained homodyne detection method is discussed. The phase detection system and circuit is presented. The simulation and experiment results show that this design scheme can achieve the purpose of phase tracking.
出处
《光纤与电缆及其应用技术》
2008年第1期6-8,共3页
Optical Fiber & Electric Cable and Their Applications
关键词
电压传感器
零差检测
相位跟踪
灵敏度
voltage sensor
homodyne detection
phase track
sensitivity
作者简介
王河林（1977-），男，中国科学院上海光学精密机械研究所博士．上海市嘉定区清河路390号，中国科学院上海光学精密机械研究所强光402室，201800
