Effect of aperture averaging on four petal Gaussian beams in atmospheric turbulence

Abstract

Aperture averaged scintillation of four petal Gaussian beam is studied in this article. Split step propagation approach which is used in wave propagation applications is selected to model atmospheric turbulence. Results are plotted in two types. First type is the analysis of aperture averaged scintillation versus propagation distance for constant receiver aperture. Second ones involve scintillation performance applying aperture averaging at constant distance. All results are compared with Gauss beam since commercial lasers generally radiates in Gaussian distribution. We observe that four petal Gaussian beam becomes more advantageous under moderate turbulence than weak one. In other point of view, it is possible to obtain less scintillation index by increasing beam order. Our results are applicable optical applications operating in atmosphere.

Keywords

• aperture averaging
• atmospheric turbulence
• four petal Gaussian beam
• scintillation

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