光束偏转器传输特性对系统定向准确度的影响  

Influence of Transmission Characteristics of Beam Deflector on Orienting Accuracy

作　　者：刘劲[1] 金韬[1] 

机构地区：[1]浙江大学信息与电子工程学系,杭州310027

出　　处：《光子学报》2005年第12期1885-1888,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(项目批准号60307005)资助项目

摘　　要：基于光束在单轴晶体交界面处的折射理论和单轴晶体中的矢量传播理论,研究了基模高斯光束通过铌酸锂光束偏转器后的电场变化,计算得到了光束定向系统探测器输出的中频电流与光束失配角之间的关系曲线.结果表明:通过铌酸锂光束偏转器后的基模高斯光束的电场分布发生了细微的变化,这种细微的电场变化将改变输出中频电流与光束失配角之间的对应关系.借助该修正的数学模型,可提高光束定向系统的角度测量准确度.The distribution of base mode Gaussian beam＇s electric field through LiNbO3 deflector is calculated based on the beam refraction theory in the media interface and the vectorial theory of propagation in anisotropic media. The model of the intermediate frequency current, from the detector of beam orienting system, versus beam mismatched angle is rebuilt. The computer simulation results demonstrate the effect of output electric field change on the intermediate frequency current as a function of mismatched angle. High beam orienting precision can be obtained based on the revised mathematical model.

关 键 词：晶体学 光束定向 铌酸锂(LiNbO3)光束偏转器 传输电场变化 

分 类 号：O734.1[理学—晶体学]