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Vortex Beam in Turbulent Kerr Medium
Version 1
: Received: 23 June 2023 / Approved: 23 June 2023 / Online: 23 June 2023 (13:14:00 CEST)
A peer-reviewed article of this Preprint also exists.
Bulygin, A.D.; Geints, Y.E.; Geints, I.Y. Vortex Beam in a Turbulent Kerr Medium for Atmospheric Communication. Photonics 2023, 10, 856. Bulygin, A.D.; Geints, Y.E.; Geints, I.Y. Vortex Beam in a Turbulent Kerr Medium for Atmospheric Communication. Photonics 2023, 10, 856.
Abstract
The dynamics of the topological charge of a vortex optical beam propagating in a turbulent air with accounting for the cubic nonlinearity is theoretically considered. On a number of examples, we show that the optical beam self-focusing manifests itself ambiguously depending on optical wave power. At near-critical values of beam power, self-focusing leads to enhanced spatial localization of optical vortices and substantial suppression of vortex walk-off relative to the beam axis caused by air turbulence. However, with increasing of optical intensity the modulation instability imposed by cubic nonlinearity becomes significant and contributes jointly with medium turbulence to faster divergence of vortex beams.
Keywords
optical vortex; optical turbulence; self-focusing; ultrashort laser pulse
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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