This article is cited in 2 papers

Physical optics

Polarization-controlled topological charge inversion of optical vortices in multielliptical optical fibers

C. N. Alexeyev, E. V. Barshak, D. V. Vikulin, B. P. Lapin, M. A. Yavorsky

V.I. Vernadsky Crimean Federal University, Simferopol, Crimea, 295007, Russia

Abstract: Analytical expressions for higher-order modes with azimuthal number $|\ell|\ge 2$ and their propagation constants for multielliptical optical fibers exhibiting a torsional mechanical stress are obtained in the vicinity of the resonance twist-pitch values. It is demonstrated that the resonance modes represent a superposition of two optical vortices with identical circular polarization and opposite signs of the topological charge. The effect of topological-charge inversion of the output optical vortex controlled by a change of sign of the circular polarization of the input beam is predicted. This effect paves the way to creating a logical CNOT element based on multielliptical fibers.

Received: 27.10.2017
Revised: 18.12.2017

DOI: 10.21883/OS.2018.04.45755.253-17

 English version: Optics and Spectroscopy, 2018, 124:4, 560–566

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