基于S波片和双延迟器的矢量光场偏振调控方法

基于S波片和双延迟器的偏振特性，提出了一种矢量光场的生成及偏振调控方法，该方法能够将标量高斯光束转换为偏振态分布可调谐的矢量光束。结合Stokes-Mueller矩阵算法，建立了矢量光场偏振调控的数学模型，并仿真计算出标量高斯光束经过S波片和双延迟器（包括双1/4波片和双1/2波片两种情况）后的偏振态空间分布。讨论了双延迟器相对旋转时光场偏振分布的演化规律及机理，实验结果与数值仿真结果相互吻合，表明该方法可以实现对标量相干光场的复杂偏振调控，验证了理论分析的正确性和该方法的可行性。

Polarization control method of vector light field based on S-wave plate and double retarders

In order to transform a Gaussian beam with uniform polarization into a vector beam with tunable polarization distribution, an optical method was proposed to generate vector beam and control the polarization distribution, based on the polarization characteristics of the S-wave plate and double retarders. Combined with the Stokes-Mueller matrix algorithm, a mathematical model of the polarization control of vector beam was established. And the polarization states distribution of the output beams were calculated, when a linear polarized Gaussian beam passed through the S-wave plate and the double retarders (including two situations:double quarter-wave plates and double half-wave plates). The relationship between the angle of the double retarders and the polarization distribution regular pattern of the output vector beam were discussed. The experimental results agree well with the numerical simulation results, which show that the method can achieve the complex polarization control for a scalar coherent beam, and the correctness of the theoretical analysis is verified.