中文摘要：

利用液晶相位可变延迟器（liquid crystal variable retarder，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．

英文摘要：

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.