基于地电位晶体的光学电场传感器对环境因素的补偿机理研究

项目名称： 基于地电位晶体的光学电场传感器对环境因素的补偿机理研究

项目编号： No.51307066

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 肖霞

作者单位： 华中科技大学

项目金额： 25万元

中文摘要： 基于线性电光效应原理的光学电场传感器是测量电场/电压的理想方法，但在实际运行环境下，电光晶体同时受电场、温度场以及应力场等外场的综合作用，晶体的折射率分布将发生变化，而影响传感器的运行稳定性。本项目拟通过在传感器的地电位侧引入另一电光晶体，环境因素分别在传感晶体和地电位晶体中产生的相位延迟形成做差补偿，建立一种新型环境不敏感的光学电场传感器并进行深入的研究。课题拟研究在电场、温度、SF6气体压力等环境因素与晶体相互作用下，晶体光学性质的变化特性；建立基于地电位晶体光学电场传感器的偏振模型，研究传感晶体和地电位晶体内通光方向与外场方向对晶体本征模的改变规律，而探索对环境因素的补偿机理；研究光路中各光学元件光学主轴方位角及其偏差对传感器特性的影响，找出传感器的制作工艺控制参数，进一步优化传感器的性能。本研究将为电光效应电场传感器的实用化奠定良好的技术基础，同时拓展光学电场传感器的应用范围。

中文关键词： 光学电场传感器；电光效应；环境因素补偿；折射率分布；

英文摘要： Optical electric field sensor based on the principle of the linear electro-optic effect is the ideal way to measure the electric field / voltage, but in the actual operating environment, by the combined effects of the electric field, temperature field and stress field Simultaneously, the distribution of the refractive index of the electro-optic crystals will change, which will affect the operational stability of the sensor. This project intends to introduce another electro-optic crystal on the ground potential side of the sensor, and that the phase retardation generated by the environmental factors in the sensing crystal and the ground potential crystal compensates for each other, and thus to establish a new optical electric field sensor with environment independency and to conduct in-depth research on it.This project also intends to study the variation characteristics of the optical properties of the crystal in its interaction with the environmental factors including the electric field, temperature, and SF6 gas pressure, to create polarization model of the optical electric field sensor based on the ground potential crystal, and to explore the impact of the optical spindle azimuth relationship of each optical element in its optical path on sensor characteristics, to investigate the compensation mechanism on the

英文关键词： Optical voltage sensor；Electro-optic effect；Compensation for environmental factors；Refraction index distribution；