Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7845805 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2018 | 9 Pages |
Abstract
Analytical expressions of average intensity and long-term beam width for a radially polarized multi-Gaussian Schell-model (MGSM) beam in anisotropic atmospheric turbulence are developed based on the extended Huygens-Fresnel principle. The influences of anisotropic non-Kolmogorov turbulence and source parameters on the average intensity, polarization and long-term beam spreading of radially polarized MGSM beam are examined in detail. The source correlations, free-space diffraction and turbulent effect jointly affect both the intensity and polarization profiles of the beam propagated in the atmosphere. As a radially polarized MGSM beam propagates in the atmosphere, increasing the associated beam order can lower the evolution rate from its flat-topped beam profile into a Gaussian beam profile because of the turbulent effect. Variations in the average intensity and long-term beam width are closely related to the propagation distance, power spectrum index, inner-scale, initial spatial coherence, and beam width. The atmospheric turbulence-induced beam spreading is generally suppressed with the enhanced anisotropy coefficient.
Related Topics
Physical Sciences and Engineering
Chemistry
Spectroscopy
Authors
Mingjian Cheng, Lixin Guo, Jiangting Li, Xu Yan, Kangjun Dong, Yang You,