声光调制器偏振特性的实验研究  

The experimental study of polarization characteristics in acousto-optic modulator

作　　者：卢向东[1] 张丽娟[1] 欧伟英[1] 

机构地区：[1]桂林电子科技大学电子工程系,广西桂林541004

出　　处：《光学技术》2006年第z1期395-397,共3页Optical Technique

摘　　要：声光调制器利用声光晶体的声光效应对输入信号进行外调制。另外,实验结果也表明:由声光调制器出射的衍射光存在偏振态的改变。旋转起偏器的透振方向,拉曼—纳斯衍射的一级衍射光的偏振态发生变化;且各级衍射光的偏振度随着透振方向的改变而发生周期性的变化。Imput signal is externally modulated by acousto-optic modulator with acousto-optical effect of acousto-optic crystal.On the other hand,the experimental results also show that the polarizations of the diffraction light outputting from acousto-optic modulator always change.When rotating polarization orientation of polarizer,the polarization of 1st diffraction light will vary in Raman-Nath diffraction.At the same time,degrees of polarization(DOP)of every diffraction order periodically alter with change of polarization orientation.

关 键 词：声光调制器 拉曼一纳斯衍射 偏振态 

分 类 号：TN65[电子电信—电路与系统]