径向阵列艾里涡旋光在倾斜大气湍流中的漂移特性北大核心CSCD

采用等Rytov指数间隔多相位屏法来模拟径向阵列艾里涡旋光束(RAAVB)沿倾斜路径通过大气湍流时的光斑质心漂移。对比并分析了拓扑荷、天顶角、湍流外尺度和涡旋离轴距离对光束漂移的影响。结果表明:光束在倾斜大气湍流中传播时,相同条件下,CAAVB的漂移现象比阵列艾里光束受湍流影响更小;相比于天顶角和湍流外尺度,拓扑荷对光束漂移现象影响更大,光束漂移随拓扑荷的增大而减小,随天顶角和湍流外尺度的增大而增大;离轴型RAAVB的漂移现象比轴上型更严重,且漂移随着涡旋离轴距离的增大而增大。

Drift characteristics of radial array Airy vortex beam in slanted atmospheric turbulence

The beam drift characteristics of a radial array Airy vortex beam(RAAVB)in slanted atmospheric turbulence is investigated with the help of the equivalent Rytov index interval multi phase screens method.The influence of zenith angle,outer scale,topological charge and vortex off axis distance on beam drift is analyzed.The results show that,when the beam is propagating in slanted atmospheric turbulence,the drift of RAAVB is smaller than that of array Airy beam under the same conditions.Compared with zenith angle and outer scale,topological charge has a greater influence on beam drift.The beam drift decreases with the increase of topology charge,increases with the increase of zenith angle and outer scale.In addition,the beam drift of off axis RAAVB is more serious than on axis RAAVB,when the vortex off axis distance increasing,the beam drift is more serious.