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基于无源相位调制器的光纤电流互感器设计

Design of Fiber-Optic Current Transformer Based on Passive Phase Modulator

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摘要

基于1/4波片相位延迟功能, 结合起偏器与法拉第旋光器, 提出了一种集起偏与相位偏置功能于一体的用于Sagnac环路中的非互易相位调制器设计方案。所提结构从根本上消除了延迟线圈对系统灵敏度的影响, 降低了系统复杂度, 减小了体积。实验测得该相位调制器的相对插入损耗为3.6 dB, 相位偏置角度为89.9605°, 实验结果能够很好地与理论分析结果吻合。提出了变比误差自补偿技术, 分析得到:当温度在-40~40 ℃范围内变化时, 不同制作工艺下系统的最低变比误差不超过±0.02%。

Abstract

Based on the phase delay function of a quarter-wave plate and combined with a polarizer and a Faraday rotator, a nonreciprocal phase modulator is proposed for the Sagnac loop, which integrates the functions of polarization and phase delay. The proposed structure fundamentally eliminates the influence of delay coil on system sensitivity, and reduces the complexity and volume of the whole system. The measured relative insertion loss of this phase modulator is 3.6 dB, and the relative phase offset angle is 89.9605°. The experimental results are well consistent with the theoretical analysis results. A variable ratio error self-compensation technology is proposed. In the range of -40~40 ℃, according to the different fabrication process, the minimum variation ratio error of the system is no more than ±0.02% when the temperature changes.

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中图分类号:TN253

DOI:10.3788/aos201939.0406004

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61205084,61735011)、河北省自然科学基金(F2016203389,C2015003053)、河北省研究生创新资助(CXZZSS2018044,CXZZBS2018056)

收稿日期:2018-10-17

修改稿日期:2018-11-26

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齐跃峰:燕山大学信息科学与工程学院, 河北 秦皇岛 066004河北省特种光纤与光纤传感重点实验室, 河北 秦皇岛 066004
冯麒:燕山大学信息科学与工程学院, 河北 秦皇岛 066004
张瑾:燕山大学信息科学与工程学院, 河北 秦皇岛 066004
张鑫:燕山大学信息科学与工程学院, 河北 秦皇岛 066004
王明君:燕山大学信息科学与工程学院, 河北 秦皇岛 066004
田东升:燕山大学理学院河北省微结构材料物理重点实验室, 河北 秦皇岛 066004
李卫:中国电子工程设计院有限公司, 北京 100142

联系人作者:齐跃峰(yfqi@ysu.cn); 冯麒(qfeng3100@qq.com);

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引用该论文

Qi Yuefeng,Feng Qi,Zhang Jin,Zhang Xin,Wang Mingjun,Tian Dongsheng,Li Wei. Design of Fiber-Optic Current Transformer Based on Passive Phase Modulator[J]. Acta Optica Sinica, 2019, 39(4): 0406004

齐跃峰,冯麒,张瑾,张鑫,王明君,田东升,李卫. 基于无源相位调制器的光纤电流互感器设计[J]. 光学学报, 2019, 39(4): 0406004

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