基于GS算法的多贝塞尔高斯光束畸变波前校正方法

Distorted wavefront correction method of multi Bessel Gaussian beam based on GS algorithm

针对大气湍流干扰下的多贝塞尔高斯光束畸变波前矫正研究场景单一的问题,提出了基于盖师贝格-塞克斯顿(GS)算法的多贝塞尔高斯光束畸变波前校正方法,采用功率谱反演法得到各向异性大气湍流相位屏,并仿真分析了异号拓扑、同号拓扑2种多贝塞尔高斯光束在3种不同大气湍流折射率结构常数影响下的畸变波前校正情况。仿真结果表明:该方法对2种多贝塞尔高斯光束在校正后的目标轨道角动量(OAM)模式纯度均能提高12%以上,OAM谱的弥散也能得到有效抑制。

Aiming at the problem that the research scene of multi Bessel Gaussian beam distorted wavefront correction under atmospheric turbulence interference is single,a multi Bessel Gaussian beam distorted wavefront correction method based on Gasberg Sexton(GS)algorithm is proposed,and the anisotropic turbulence phase screen is obtained by using the power spectrum inversion method.The distorted wavefront correction of two kinds of multi Bessel Gaussian beam with different sign topology and the same sign topology under the influence of three different atmospheric turbulence refractive index structure constants is simulated and analyzed.The simulation results show that the purity of the target orbital angular momentum(OAM)mode of the two kinds of multi Bessel Gaussian beam after correction can be improved by more than 12%,and the dispersion of OAM spectrum can also be effectively suppressed.