激光偏振编码制导中CdTe晶体编码技术研究  

Encoding using CdTe crystal in laser polarization encoding guidance

作　　者：周木春[1] 陈延如[1] 赵琦[1] 袁兴起[1] 

机构地区：[1]南京理工大学电光学院,江苏南京210094

出　　处：《红外与激光工程》2006年第z1期515-518,共4页Infrared and Laser Engineering

基　　金：南京理工大学科研发展基金(XKF05024);国家自然科学基金(50176020);国防基础研究基金资助

摘　　要：针对激光驾束制导系统光束能量调制方式的原理缺陷,讨论了用电光晶体的电光效应实现生间偏振编码的原理。对适于10.6μm激光的 CdTe 晶体的电光效应进行了理论分析,在此基础上设计了基于普科尔效应的空间偏振编码调制器.确定了 X,Y,Z 轴方向加电场具有相同的效应,采用横向运用方式,使得经过编码器后的线偏振光形成最上方近似右旋圆偏振光到中间的线偏振光再到最下方的左旋圆偏振光的偏振态梯度分布,从而实现对弹的偏振制导.In order to solve the theoretical limitation of laser beam energy modulating commonly applied in existing laser beam rider guidance system,the principle of realization of space polarization encoding and decoding using crystal for its electro-optic effect is studied.The electro-optic effect of CdTe crystal which is transparent for 10.6 μm laser is analyzed,based on which a modulator used in space polarization encoding system is designed. Furthermore,applying the electric field in X direction is found to be same with that in other directions.When transversely modulated,polarization states varying through approximately circular polarization of one handedness to the linear polarization at the center of the beam and then to circular polarization of the opposite handedness can be got after encoder and be used to realize polarization encoding.

关 键 词：物理光学 编码器 偏振编码 激光制导 CdTe晶体 

分 类 号：O439[机械工程—光学工程] O436.3[理学—光学]