Dependence of the density of the probability of turbulent fluctuations of the orbital angular moment of a laser beam on the size of the receiver aperture

Valerii P. Aksenov; Valeriy V. Kolosov; Cheslav E. Pogutsa; Grigorii A. Filimonov

doi:10.1117/12.2575714

12 November 2020 Dependence of the density of the probability of turbulent fluctuations of the orbital angular moment of a laser beam on the size of the receiver aperture

Valerii P. Aksenov, Valeriy V. Kolosov, Cheslav E. Pogutsa, Grigorii A. Filimonov

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Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 1156029 (2020) https://doi.org/10.1117/12.2575714
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

Statistical characteristics of the orbital angular momentum (OAM) of a Laguerre-Gaussian laser beam propagating through a turbulent atmosphere have been studied in the Monte Carlo numerical simulation. We have analyzed variations in the probability density of OAM versus its initial value, turbulent conditions along the propagation path, the diffraction parameter of the beam, and the receiving aperture size. This distribution is shown to be symmetrical near-Gaussian for an infinite receiving aperture and to be well approximated by an Edgeworth series. The probability density function significantly changes for finite-size apertures. The range of sizes of the receiving aperture has been found where fluctuations of the moment of energy flux density and fluctuations of light flux recorded can be considered uncorrelated.

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Valerii P. Aksenov, Valeriy V. Kolosov, Cheslav E. Pogutsa, and Grigorii A. Filimonov "Dependence of the density of the probability of turbulent fluctuations of the orbital angular moment of a laser beam on the size of the receiver aperture", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 1156029 (12 November 2020); https://doi.org/10.1117/12.2575714

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KEYWORDS

Atmospheric propagation

Laser beam propagation

Statistical analysis

Beam propagation method

Numerical simulations

Turbulence

Receivers

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