Open AccessAnalysis of beam wander effect in high turbulence for FSO communication link
Author(s) -
Mukherjee Arka,
Kar Subrat,
Kumar Jain Virander
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2018.5409
Subject(s) - turbulence , eddy , laminar flow , optics , beam (structure) , refractive index , scintillometer , free space optical communication , physics , refractive index profile , aperture (computer memory) , computational physics , optical communication , mechanics , atmospheric turbulence , acoustics
Atmospheric turbulence causes severe impairment of FSO communication link. Existing model underestimates the beam wander effect in high turbulence regime. In this paper, we model each turbulent eddy as a thin dielectric lens with Gaussian shaped refractive index profile and assume there are several sheets of eddies throughout the propagation path. We consider uniformly distributed eddy positions in a laminar sheet with Gamma distributed eddy sizes and refractive index fluctuations. We calculate mean beam wander and link availability for a given aperture size in high turbulence regime. Our simulation results show good concordance with the analytical results.