Open AccessPropagation of multi-Gaussian Schell-model vortex beams in isotropic random media
Author(s) -
Miaomiao Tang,
Daomu Zhao
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.032766
Subject(s) - physics , isotropy , gaussian , optics , turbulence , coherence (philosophical gambling strategy) , probability density function , vortex , spectral density , homogeneous isotropic turbulence , computational physics , beam (structure) , coherence length , atmospheric turbulence , direct numerical simulation , mechanics , mathematics , quantum mechanics , statistics , superconductivity , reynolds number
The effect of isotropic and homogeneous random media on propagation characteristics of recently introduced multi-Gaussian Schell-model (MGSM) vortex beams is investigated. The analytical formula for the cross-spectral density function of such a beam propagating in random turbulent media is derived and used to explore the evolution of the spectral density, the degree of coherence and the turbulence-induced spreading. An example illustrates the fact that, at sufficiently large distance from the source, the source correlations modulation of the spectral distribution in free space is shown to be suppressed by the uniformly correlated turbulence. The impacts, arising from the index M, the correlation width of the source and the properties of the medium on such characteristics are analyzed in depth.