液晶相位可变延迟器对光偏振态的调制  

Photon Polarization Modulation with Liquid Crystal Variable Retarder

作　　者：丁海兵[1] 庞文宁[1] 刘义保[1] 尚仁成[1] 

机构地区：[1]清华大学物理系,北京100084

出　　处：《光子学报》2006年第9期1397-1399,共3页Acta Photonica Sinica

基　　金：国家自然科学重点基金(10134010)资助

摘　　要：利用液晶相位可变延迟器(liquidcrystalvariableretarder,LCVR)的延迟相位随着其驱动电压连续可调特性,实现光偏振态的可控调制.设计了旋转检偏器,对LCVR进行820nm激光波长的现场校准,获得1/4λ、3/4λ和1/2λ、1λ相位延迟所对应的驱动电压,计算机控制其驱动电压实现对光偏振态的调制,并进行了检验,给出了理论分析和实验结果.该方法具有对光子入射方向不敏感、无需机械转动、适用较宽波长范围、实时可控等优点.The modulation of photon polarization by liquid crystal variable retarder （LCVR） whose phase retardation can be controlled easily by its driving voltage is described. A spinning polarimeter is designed to calibrate the LCVR for 820nm wavelength in situ. The driving voltages corresponding to 1/4λ, 3/4λ, 1/ 2λ and 1λ of LCVR are obtained, and the polarization of photon is modulated by changing the driving voltage via a computer. The theoretical analysis and experimental result are presented. The advantages of the proposed method are insensitivity to the incident photon direction, large wavelength range without mechanical movement, and real-time control.

关 键 词：物理光学 液晶相位可变延迟器 相位延迟 偏振态 

分 类 号：O433[机械工程—光学工程]