部分相干双涡旋光束在湍流介质中的传输

摘要

基于广义惠更斯-菲涅耳原理，推导了部分相干双涡旋光束在湍流介质中传输时光强分布变化规律的理论公式；并在实验上用螺旋相位板和随机相位板产生了此类光束，其内外双环可各自携带不同拓扑荷数；分析比较了此光束在传榆中的光强分布，讨论了不同参数对其光斑大小的影响。结果表明部分相干双涡旋光束的双环在湍流大气中是相互独立传输的，其传输特性会受到光束的拓扑荷数、空间相干度、湍流扰动强弱和传榆距离的影响。%Based on the extended Huygens-Fresnel principle, the intensity distribution formula of partially coherent double-vortex beams propagating in a turbulent atmosphere is derived. In addition, this kind of beams with two different topological charges is generated by using spiral phase plates and rotated random phase plates experimentally. The intensity distribution of the beams on propagation and the influence of the characteristic parameters to the beam size are investigated in detail. The results show that each ring of the beams is propagating independently in turbulent atmosphere and the propagation properties is influenced by the topological charges, the spatial coherence, atmospheric turbulence and the propagation distance.