Evolution of phase singularities of vortex beams propagating in atmospheric turbulence.
Evolution of phase singularities of vortex beams propagating in atmospheric turbulence.
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DOI：
10.1364/josaa.32.000837
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Xiao-lu Ge;Ben-Yi Wang;Cheng-Shan Guo
中科院分区：
文献类型：
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作者：
Xiao-lu Ge;Ben-Yi Wang;Cheng-Shan Guo
通过数值模拟研究了涡旋光束在大气湍流中的传播，计算了涡旋光束在湍流中存在的相位奇点。结果表明，测试孔径中存在的所有相位奇点的拓扑电荷的代数和近似等于输入涡旋光束的拓扑电荷。这一特性为确定涡旋光束在大气湍流中传播的TC提供了一种可能的方法，在利用光涡旋的光通信中具有潜在的应用价值。
Optical vortex beams propagating through atmospheric turbulence are studied by numerical modeling, and the phase singularities of the vortices existing in the turbulence-distorted beams are calculated. It is found that the algebraic sum of topological charges (TCs) of all the phase singularities existing in test aperture is approximately equal to the TC of the input vortex beam. This property provides us a possible approach for determining the TC of the vortex beam propagating through the atmospheric turbulence, which could have potential application in optical communication using optical vortices.