Methods of optical vortex registration

Kanev, F. Yu.; Aksenov, V. A.; Makenova, Nailya; Veretekhin, Igor Veretekhin

doi:10.1117/12.2540289

Cited by 3 publications

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“…The beam had Gaussian amplitude profile; phase modulation was realized in the plane of emitting aperture by a phase screen simulating atmospheric turbulence. Spectral density of the index of refraction fluctuations on this screen was given by the following equation [8]:…”

Section: The Numerical Modelmentioning

confidence: 99%

Optical vortices in the turbulent atmosphere

Kanev

Makenova

Veretekhin

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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In the present article the influence is considered of phase screen characteristics on the statistical properties of dislocations developed in a beam passed this screen. Analysis was performed with application of numerical experiment methods, and in the developed model the screen represented a thin layer of turbulent atmosphere. Special attention was devoted to assessment of the turbulence inner scale impact on distribution of vortices. We have also shown that this distribution meets the requirements of the central limit theorem.

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Section: The Numerical Modelmentioning

confidence: 99%

Optical vortices in the turbulent atmosphere

Kanev

Makenova

Veretekhin

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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Characteristic features of an optical vortex distribution in a beam passed a thin layer of turbulent medium and the central limit theorem

Veretekhin,

Kanev,

Makenova

2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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Statistical characteristics of optical vortices have been analyzed in the paper. As was shown such vortices appear in the radiation wavefront if the initial phase is set as a mathematical raw formed by Zernike polynomials or by a phase screen simulating atmospheric turbulence with a spectrum of the index of refraction fluctuations prescribed by a von Karman formula. In both examples considered here the statistical properties of the vortex distribution satisfy the requirements of the Central limit theorem, and acceptable correspondence is also observed between parameters of beams formed by polynomials and by a phase screen.

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Development of Singular Points in a Beam Passed Phase Screen Simulating Atmospheric Turbulence and Precision of Such a Screen Approximation by Zernike Polynomials

2022

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This article addresses two issues. Firstly, it was shown that if the initial phase of a Gaussian beam is specified by the sum of Zernike polynomials or by a screen simulating atmospheric turbulence, in the process of propagation, singular points appear in the wavefront of such a beam. With the use of numerical simulation, the dependence of the vortices number on the distortion characteristics and on the distance traveled by the beam was determined. The second problem analyzed in the article is the problem of a phase screen approximation by a series formed by Zernike polynomials. The carried out numerical experiments made it possible to determine the dependence of approximation accuracy on the screen parameters and on the number of polynomials entering the basis of approximation.

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Methods of optical vortex registration

Cited by 3 publications

References 0 publications

Optical vortices in the turbulent atmosphere

Optical vortices in the turbulent atmosphere

Characteristic features of an optical vortex distribution in a beam passed a thin layer of turbulent medium and the central limit theorem

Development of Singular Points in a Beam Passed Phase Screen Simulating Atmospheric Turbulence and Precision of Such a Screen Approximation by Zernike Polynomials

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