光学学报, 2020, 40 (11): 1101001, 网络出版: 2020-06-10
径向偏振矢量光束在大气湍流下的传输分析 下载: 1293次
Propagation Properties of Radially-Polarized Vector Beams Under a Turbulent Atmosphere
大气光学 矢量光束 大气湍流 闪烁指数 大气传输 atmospheric optics vortex beams atmospheric turbulence scintillation index atmospheric propagation
摘要
基于von Karman谱模型采用分步相位屏幕方法,仿真模拟不同阶次径向偏振矢量光束在Kolmobarov大气湍流中的传输特性,并对其Stokes矢量、闪烁指数、光束重心径向偏移量进行分析。研究发现:大气湍流下径向偏振矢量光束的光强分布环形特征的最大识别距离大于标量涡旋光束,其闪烁指数与光束重心径向偏移量都小于标量涡旋光束;高阶光束能在更远的距离保持环形特征,具有更小的闪烁指数与光束重心径向偏移量;径向偏振矢量光束的Stokes矢量图像会发生扩散与畸变。仿真结果表明,大气湍流下径向偏振矢量光束比标量涡旋光束具有更好的大气湍流抗性,高阶光束的部分性质优于低阶光束。
Abstract
Based on the von Karman spectral model, a step-by-step phase screen method is employed in this study to simulate the propagation characteristics of radially-polarized vector beams with different orders in the Kolmobarov’s atmospheric turbulence. Furthermore, the Stokes vectors, scintillation index, and radial deviations of gravity centers of beams are analyzed. The simulation results show that the maximum discriminating distance of the ring features of the radially-polarized vector beam under an atmospheric turbulence is larger than that of the scalar vortex beam, and its scintillation index and the radial deviation of the gravity center of beams are smaller than those of scalar vortex beams. High-order beam can maintain its ring shape features at a larger distance than that of a low-order beam, and the scintillation index and the radial deviation of gravity center of beam for high-order beams are observed to be smaller. The Stokes vectors images of the radially-polarized vector beams get diffused and distorted. In conclusion, the radially-polarized vector beams have better turbulence resistance than the scalar vortex beams under an atmospheric turbulence, and high-order beams exhibit better properties than low-order beams in some way.
张建强, 翟焱望, 付时尧, 高春清. 径向偏振矢量光束在大气湍流下的传输分析[J]. 光学学报, 2020, 40(11): 1101001. Jianqiang Zhang, Yanwang Zhai, Shiyao Fu, Chunqing Gao. Propagation Properties of Radially-Polarized Vector Beams Under a Turbulent Atmosphere[J]. Acta Optica Sinica, 2020, 40(11): 1101001.