基于磁光调制原理的高精度偏振角测量方法模拟与实验研究  

Modeling and experimental study on a high precision polarization measurement based on magneto-optical modulation

作　　者：孟甜甜[1] 符照森[1] 刘辉[1] 李丹[1] 安楠[1] 李小俊[1] 

机构地区：[1]西北大学光子学与光子技术研究所/陕西省光电技术与功能材料省部共建国家重点实验室培育基地,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2011年第6期964-968,共5页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省教育厅省级重点实验室科研计划基金资助项目(08JZ682010JS111);西北大学研究生创新教育基金资助项目(09YZZ55)

摘　　要：目的研究基于磁光调制原理偏振角的高精度测量方法。方法利用计算机模拟和实验方法,分别研究了基于正弦波的磁光调制和基于方波的磁光调制,并对其测量角精度进行分析。结果研究发现正弦波磁光调制的精度比消光法等传统方法有很大的提高,达到0.01°,而方波调制的精度更高,可达到0.000 1°。结论相对于磁光调制法,方波磁光调制更具优势,判断更简便,测量精度大幅度提高。同时,也容易实现自动测量。Aim To study the high precision polarization measuring methods based on magneto-optical modulation. Methods Modeling and experiments are used to study the sine wave magneto-optical modulation and the rectangular wave magneto-optical modulation, and its precision is analyzed. Results The research showed that the precision of the sine wave magneto-optical modulation has exceed 0.01 °compared with extinction method and other conventional methods, while the precision of the rectangular wave magneto-optical modulation could exceed 0. 000 1 °. Conclusion Magneto-optical modulation is a kind of high precision measurement method, and the rectangular wave magneto-optical modulation owns more superiority. The extinction position can be judged by the discrete points ,which makes the judgment easier and the measurement accuracy increased significantly. At the same time, it is easy to achieve automatic measurement in the rectangular wave magneto-optical modulation.

关 键 词：方波 正弦波 磁光调制 物理光学 

分 类 号：O436.4[机械工程—光学工程]