Analysis of beam quality of vortex beam propagating through turbulence atmosphere

被引：0

作者：

Department of Physics, Taiyan University of Science and Technology, Taiyuan, China ^{[1
]}

机构：

[1] Department of Physics, Taiyan University of Science and Technology, Taiyuan

来源：

Guangdianzi Jiguang | / 9卷 / 1828-1834期

关键词：

Angular spread; Atmospheric turbulence; Beam propagation factor (M[!sup]2[!/sup] factor); Vortex beam;

D O I：

10.16136/j.joel.2015.09.0385

中图分类号：

学科分类号：

摘要：

Based on the extended Huygens-Fresnel principle and the definition of second-order moments of the Wigner distribution function (WDF), the analytical expressions for the beam propagation factors (M2 factors) and angular spread of Gaussian Schell-model (GSM) vortex beams (topological charge m=±1) and non-vortex beams propagating through atmospheric turbulence and free space are derived, and they are used to study the influence of atmospheric turbulence parameters and beam parameters on the beam quality. It is shown that the smaller the propagation distance z, the structure constant Cn2 and the spatial correatin length σ0 are, as well as the larger the inner scale l0 and the wavelength λ are, the less the propagation of GSM vortex beams is affected by atmospheric turbulence is, and the better the beam quality is. Compared with the GSM non-vortex beam, the GSM vortex beam is more beneficial to the beam propagation through atmospheric turbulence and is more conformable to be applied to the atmosphere laser communications. The work can provide the theoretical foundation and experimental basis for free space optical communications and laser weapon. ©, 2015, Board of Optronics Lasers. All right reserved.

引用

页码：1828 / 1834

页数：6

共 24 条

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