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Performance investigation of free space optical communication system using Gaussian beam wave

A. SHARMA1,* , R. S. KALER1

Affiliation

  1. Department of Electronics & Comm., Thapar University, Patiala 147004 Punjab, India

Abstract

In this paper the propagation of Gaussian beam in turbulent atmosphere for free space optical communication has been studied. The intensity on axis of Gaussian beam wave, `beam radius and radius of curvature at the receiver has been evaluated and discussed. The effect of aperture averaging on Gaussian beam wave for different turbulence strength of atmosphere has been shown graphically. The aperture averaging factor decreases under high atmospheric strength and averaging ability of the receiving system increases by increasing receiving aperture diameter. Additionally an improved expression of scintillation loss has been evaluated using threshold power approach. This expression takes into account the loss due to scintillation when Gaussian wave propagates through atmospheric turbulence. Results show that probability of fading and losses due to scintillation are considerably lower when threshold power level is set low..

Keywords

Scintillation, Gaussian Beam, Aperture averaging, Optical wireless.

Submitted at: Feb. 24, 2015
Accepted at: March 19, 2015

Citation

A. SHARMA, R. S. KALER, Performance investigation of free space optical communication system using Gaussian beam wave, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 3-4, pp. 302-306 (2015)