Spreading of Partially Coherent Sinh-Gaussian Beams in Slant Atmospheric Turbulence

Abstract

Based on the extended Huygens-Fresnel principle, taking the partially coherent sinh-Gaussian (ShG) beam as a typical example of partially coherent beams, the analytical expressions for the root mean square width and angular spread of partially coherent ShG beams in atmospheric turbulence along a slant path are derived, and used to study the influence of propagation path on the propagation of partially coherent ShG beams in atmospheric turbulence. It is shown that the spreading of partially coherent ShG beams along a horizontal path is larger than that along a slant path in atmospheric propagation. The influence of atmospheric turbulence along a slant path on the partially coherent ShG beams propagation is smaller than that along a horizontal path. Therefore, the slant path is more beneficial to the beam propagation through atmospheric turbulence in comparison with the horizontal propagation. The validity of our results is interpreted physically. Results in this paper may provide potential applications in free-space optical communications.