Open AccessPropagation of cosine-Gaussian-correlated Schell-model beams in atmospheric turbulence
Author(s) -
Zhangrong Mei,
Elena Schchepakina,
Olga Korotkova
Publication year - 2013
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.21.017512
Subject(s) - physics , optics , degree of coherence , coherence (philosophical gambling strategy) , beam (structure) , coherence length , spectral density , gaussian , atmospheric optics , beam diameter , m squared , computational physics , isotropy , mathematics , quantum mechanics , laser beams , laser , statistics , superconductivity
A stochastic beam generated by a recently introduced source of Schell type with cosine-Gaussian spectral degree of coherence is shown to possess interesting novel features on propagation in isotropic and homogeneous atmospheric turbulence with general non-Kolmogorov power spectrum. It is shown that while at small distances from the source the beam's intensity exhibits annular profile with adjustable area of the dark region, the center disappears at sufficiently large distances and the beam's intensity tends to Gaussian form. Hence the 3D bottle beam is produced by the cumulative effect of the random source and the atmosphere. The distances at which the on-axis beam intensity has local minima and maxima are shown to have analytic dependence on the source and the atmospheric parameters. And the influence of the fractal constant of the atmospheric power spectrum and refractive-index structure constant on beam characteristics is analyzed in depth. The novel double-cycle qualitative change in the degree of coherence is shown to occur on atmospheric propagation which was not previously known for any other beams.