光学学报, 2015, 35 (s1): s101005, 网络出版: 2015-07-27
拓扑电荷在大气湍流中的守恒距离
Distance for Conservation of Topological Charge in Atmospheric Turbulence
物理光学 拓扑电荷守恒距离 衍射积分 相干涡旋 非Kolmogorov大气湍流 physical optics the distance for the conservation of topological c diffraction integral coherent vortices non-Kolmogorov atmospheric turbulence
摘要
基于非Kolmogorov谱模型和广义惠更斯-菲涅耳原理,以双曲余弦高斯(ChG)涡旋光束为例,对部分相干ChG涡旋光束在非Kolmogorov大气湍流传输中拓扑电荷的守恒距离做了详细的研究。研究表明,广义结构常量C~2n越大,广义指数参量α越小,湍流内尺度l0越小,空间相关长度σ0越小,束腰宽度w0越大,则拓扑电荷守恒距离越小,而湍流外尺度L0和双曲余弦部分参数Ω0对拓扑电荷守恒距离无影响。
Abstract
Based on the non-Kolmogorov spectrum and the generalized Huygens-Fresnel principle, taking the cosh-Gaussian (ChG) vortex beams as a typical example, the distance for the conservation of topological charge of partially coherent ChG vortex beams propagating through non-Kolmogorov atmospheric turbulence is studied. With the increment of general structure constant C~2n and the waist width w0, as well as the decrement of the general exponent α, the inner scale l0 and spatial correlation length σ0, the distance for the conservation of topological charge will decrease , whereas outer scale L0 and part parameters of hyperbolic cosine Ω0 has no effect on the distance for the conservation of topological charge.
曾军, 李晋红. 拓扑电荷在大气湍流中的守恒距离[J]. 光学学报, 2015, 35(s1): s101005. Zeng Jun, Li Jinhong. Distance for Conservation of Topological Charge in Atmospheric Turbulence[J]. Acta Optica Sinica, 2015, 35(s1): s101005.