电光晶体的Pockels效应仿真研究  

Simulation research on pockels effect of electro-optic crystal

作　　者：周扬 卜乐平[1] 王黎明[1] 胡致远 杨娅姣 Zhou Yang;Bu Leping;Wang Liming;Hu Zhiyuan;Yang Yajiao(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China;Beijing Aerospace Times Optoelectronics Technology Co.,Ltd,China Academy of Aerospace Electronic Technology,Beijing 100094,China)

机构地区：[1]海军工程大学电气工程学院,武汉430033 [2]中国航天电子技术研究院,北京航天时代光电科技有限公司,北京100094

出　　处：《电子测量与仪器学报》2021年第7期123-129,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(41774021,41974005)项目资助。

摘　　要：结合麦克斯韦方程组建立了光在电光晶体中传播的数学模型;通过有限元仿真分别建立了铌酸锂晶体和锗酸铋晶体的物理参数模型,提出了一种通用的入射光三维波动场仿真方法,该方法将晶体内部电场分布和电光效应耦合波理论相结合,计算了在横向调制下两种晶体的Pockels效应,其结果与理论差值在10-5数量级内;同时,仿真结果表明,铌酸锂晶体的Pockels效应更为明显。最后对两种不同材质的电光晶体进行了0~1 000 V直流加压实验,实验表明铌酸锂晶体的Pockels效应测量精度优于±2.9%。该方法为光学电压传感器电光晶体的选择和性能评估提供了新的研究思路与理论参考。Combined with Maxwell’s equations, a mathematical model of light propagation in electro-optic crystals was established;physical parameter models of lithium niobate crystal and bismuth germanate crystal were established through finite element simulation, and a universal three-dimensional wave field simulation method of incident light was proposed. This method combines the electric field distribution inside the crystal with the coupled wave theory of the electro-optic effect, and calculates the Pockels effect of the two crystals under transverse modulation. The difference between the results and the theory is within 10-5 orders of magnitude;at the same time, the simulation results show that the Pockels effect of lithium niobate crystals is more obvious. Finally, 0~1 000 V DC voltage experiments are carried out on two electro-optic crystals of different materials. The experiment shows that the measurement accuracy of the Pockels effect of the lithium niobate crystal is better than ±2.9%. This method provides new research ideas and theoretical references for the selection and performance evaluation of electro-optic crystals for optical voltage sensors.

关 键 词：电光晶体 光学电压传感器 POCKELS效应 有限元分析 光波场仿真 

分 类 号：TN98[电子电信—信息与通信工程] O436.4[机械工程—光学工程]