Bagmanov, V.H.; Sultanov, A.K.; Meshkov, I.K.; Gizatulin, A.R.; Nigmatullin, R.R.; Sakhabutdinov, A.Z. Propagation and Transformation of Vortexes in Linear and Nonlinear Radio-Photon Systems. Fibers2022, 10, 4.
Bagmanov, V.H.; Sultanov, A.K.; Meshkov, I.K.; Gizatulin, A.R.; Nigmatullin, R.R.; Sakhabutdinov, A.Z. Propagation and Transformation of Vortexes in Linear and Nonlinear Radio-Photon Systems. Fibers 2022, 10, 4.
Bagmanov, V.H.; Sultanov, A.K.; Meshkov, I.K.; Gizatulin, A.R.; Nigmatullin, R.R.; Sakhabutdinov, A.Z. Propagation and Transformation of Vortexes in Linear and Nonlinear Radio-Photon Systems. Fibers2022, 10, 4.
Bagmanov, V.H.; Sultanov, A.K.; Meshkov, I.K.; Gizatulin, A.R.; Nigmatullin, R.R.; Sakhabutdinov, A.Z. Propagation and Transformation of Vortexes in Linear and Nonlinear Radio-Photon Systems. Fibers 2022, 10, 4.
Abstract
The article is devoted to issues related to the propagation and transformation of vortexes in the optical range of frequency. Within the framework of the traditional and modified model of slowly varying envelope approximation (SVEA), the process of converting vortex beams of the optical domain into vortex beams of the terahertz radio range based on nonlinear generation of a difference frequency in a medium with a second-order susceptibility is considered. The modified SVEA splits a slowly varying amplitude into two factors, which makes it possible to more accurately describe the three-wave mixing process. The theoretical substantiation of the rule of vortex beams topological charges conversion is given – the topological charge of the output radio-vortex beam is equal to the difference between the topological charges of the input optical vortex beams. A numerical simulation model of the processes under consideration has been implemented and analyzed.
Keywords
vortex propagation; difference frequency generation; nonlinear medium; vortex beams conversion
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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