Analysis of beam wander effect in high turbulence for FSO communication link

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...

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Bibliographic Details
Published in:IET communications 2018-12, Vol.12 (20), p.2533-2537
Main Authors: Mukherjee, Arka, Kar, Subrat, Kumar Jain, Virander
Format: Article
Language:English
Subjects:
aperture size
atmospheric light propagation
atmospheric turbulence
beam wander effect
dielectric lens
eddy positions
FSO communication link
Gamma distributed eddy sizes
gamma distribution
high turbulence regime
optical links
propagation path
refractive index
refractive index fluctuations
refractive index profile
Research Article
turbulent eddy
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Summary: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.
ISSN:1751-8628
1751-8636
1751-8636
DOI:10.1049/iet-com.2018.5409