Analysis of Laser Propagation Characteristics in Atmospheric Channel of FSOC

Abstract

The high-bandwidth feature of Free-Space Optical Communication (FSOC) is advantageous for the construction of future seamless global mobile communication networks. In order to reduce the influence of atmospheric turbulence on laser beams of FSOC system, the propagation and diffusion characteristics of laser beams in atmospheric channel are analyzed. According to the expressions of transmitter beam radius and the radius of curvature of the phase front, the collimated beam radius as a function of various wavelength of laser beam, atmospheric turbulence conditions, transmitter beam radius and spatial coherence properties are simulated. In addition, we provide a theoretical basis for the budget analysis of FSOC links, which can serve as a reference for developers to weigh the constraints of various detail parameters for maximizing the performance of optical communication systems.