ASES II. INTERNATIONAL HEALTH, ENGINEERING AND SCIENCES CONGRESS, Kayseri, Turkey, 19 - 22 August 2022, pp.45-46
Our aim is to present, analytically, the formulae of necessary random light beam anisotropy for effective free space communications. A profound efficiency will be shown for the use of random electromagnetic and anisotropic light beam in the free space spectral analysis. There are three main parts for the methods; Correlation parameters of the light beam, Scintillation index, and Signal-to-noise ratio in the presence or absence of atmosphere. After the pioneer studies of partial coherence in scintillation index and in signal-to-noise ratio, it is now possible to analyze the stochastic beam anisotropy for these necessary topics. And, the light that is used in communications is broadband and has a range of coherence values from incoherent to fully coherent. Therefore, by using the tools of partial coherence theory of optics together with the new models of Gaussian beams, I observe the change in the correlations of partially coherent light passing through free space. As a result, according to the analysis obtained, the partial coherence parameter has a different effect on the scintillation index and the received power. While a laser source becomes partially coherent, it causes a decrease in the scintillation, hence we expect high signal tonoise ratio. In conclusion, the effect of anisotropic beams’ source partial coherence on the performance of a free space optical system system unde r the absence of atmospheric turbulence is examined. I’ve found that the use of random anisotropic Gaussian beams is more adventageous when we take the source correlations into consideration for free space communications.
Keywords: Free space communication s, partially coherent light; optical communications