法拉第磁光效应与电致旋光效应互补特性实验  

Experiment of the characteristic of mutual compensation between Faraday magnetooptical effect and electrogyration effect

作　　者：李长胜[1] 张晞[1] 冯丽爽[1] LI Chang-sheng;ZHANG Xi;FENG Li-shuang(School of Instrumentation Science and Optoelectronics Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《大学物理》2018年第6期25-29,40,共6页College Physics

基　　金：北京航空航天大学仪器科学与光电工程学院教学改革项目资助

摘　　要：利用单块钼酸铅(PbMo_O4,PMO)晶体,实验验证了法拉第磁光效应与电致旋光效应的互补特性.该实验的教学意义在于使学生通过实验理解这两个光学效应的共同本质属性,即它们均属于外场致偏振旋光调制.实验装置主要包括两个偏振器、钼酸铅晶体及其调制电压源和电流源;当将相位相反的交流调制电流和电压同时施加于钼酸铅晶体时,实验观测到磁光调制和电致旋光调制具有相互补偿的特性,其补偿电压约为0.541 kV/A.The characteristic of mutual compensation between Faraday magnetooptical effect and electrogyration effect is experimentally demonstrated by the use of single lead molybdate（ PbMoO4,PMO） crystal.The teaching purpose of this experiment is to help college students to understand similar and inherent characteristic of the two optical effects,i. e.,external field-induced polarization rotation in crystals. Experimental setups mainly include two polarizers,one block of single PMO crystal together with its modulating current and voltage supplies.Under simultaneous application of an ac current and an anti-phased voltage to the PMO crystal,we have observed the phenomenon of mutual compensation between the two effects,and the compensating voltage is about 0.541 kV/A.

关 键 词：法拉第磁光效应 电致旋光效应 互补特性 钼酸铅晶体 

分 类 号：O436.4[机械工程—光学工程] G642.3[理学—光学]