【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.更多还原

【Abstract】 The modulation of photon polarization by liquid cryst al variable retarder (LCVR) whose phase retardation can be controlled easily by its driving voltage is described. A spinning polarimeter is designed to calibrat e 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 voltagevia a computer. The theoretical analysis and experimental result are presented. Th e advantages of the proposed method are insensitivity to the incident photon dir ection, large wavelength range without mechanical movement, and real-time contr ol.更多还原