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.
出处
《光子学报》
EI
CAS
CSCD
北大核心
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
关键词
物理光学
液晶相位可变延迟器
相位延迟
偏振态
Physical optics
Liquid crystal variable retarder
Phase retardation
Polarization
