全光纤电压传感器相位检测的设计方案  

Design of Phase Detection of All-Fiber Voltage Sensor

作　　者：王河林[1] 杨爱军[2] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]北京理工大学理学院,北京100081

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

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.

关 键 词：电压传感器 零差检测 相位跟踪 灵敏度 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]