电光角度信息传递装置中光学器件定位误差研究  

Study for Positioning Errors of Optical Devices in Electro-Optic AngularInformation Transmission System

作　　者：郭文刚[1] 范宇[1] 罗绍钧[1] 李春雷[1] 吕福云[1] 盛秋琴[1] 董孝义[1] 

机构地区：[1]南开大学物理科学学院光电信息科学系,天津300071

出　　处：《光电子．激光》2004年第8期959-962,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(69977012);国家自然科学基金重点资助项目(60137010)

摘　　要：电光角度信息传递装置是利用铌酸锂晶体的线性电光效应,实现2.5s的角度信息传递和检测。装置由两部分组成:发射部分包括铌酸锂晶体、起偏器、λ/4波片和LD激光器;接收部分包括渥拉斯顿棱镜和两个光检测器。导出了出射的两束光的光强差与发射部分和接收部分之间相对转角的关系,从理论上分析了光学器件定位误差对电光角度信息传递装置性能的影响,并通过实验进行了验证,理论计算和实验结果符合得很好。The optical devices of angle-information transfer system were designed by use of the electro-optic effect of LiNbO3, and a minimum 2.5 s angle variation can be detected with this system. The set-up is made up of a transmitting set and a receiving set. The transmitting set is composed of a LiNbO3 crystal placed between a polarizer and a quarter-wave plate, and a laser diode (LD). The receiving set consists of a Wollasidon prism and two photoconductive detectors. We have deduced the relationship between the intensity difference of the outgoing beams (ordinary beam and extraordinary beam) and the relative angle of the transmitting set and the receiving set. The effects of position errors of the optical devices on the characteristic of the angle-information transfer system are investigated. The relevant experiments are carried out and the results agree with our theoretical calculations.

关 键 词：角度信息 接收 光学器件 发射 LD 激光器 铌酸锂晶体 部分和 波片 传递 

分 类 号：TN957.52[电子电信—信号与信息处理] TN974[电子电信—信息与通信工程]