Eur. Phys. J. D (2014) 68: 158
https://doi.org/10.1140/epjd/e2014-40764-8

Regular Article

The effect of atomic and optical perturbations on formation and propagation of vortex solitons in a dense atomic media of gas-filled hollow-core optical fibers

¹ Department of Physics and Applied Mathematics, Stoletovs Vladimir State University, Gorky Str. 87, 600000 Vladimir, Russia
² Institute for Spectroscopy of the Russian Academy of Sciences, Fizicheskaya Str. 5, Troitsk, 142190 Moscow, Russia

^a e-mail: mglad@isan.troitsk.ru

Received: 5 December 2013
Received in final form: 28 March 2014
Published online: 23 June 2014

Abstract

We study the problem of formation and stability of light vortices in presence of atomic and optical perturbations in a hollow-core fibers filled with a cold gas of three-level ⁸⁷Rb atoms. We show that the Lorentz local field in description of light-matter interaction is responsible for a significant shift of the stability area of the vortex solitons on the plane of the control parameters. Scenarios of jump-like transitions of vortex solitons to vortex-free localized optical structures are determined for the cases when those are initiated by either modulation of the pump field intensity, or generation of sound waves, or increase of temperature-dependent fluctuations of the gas density in the hollow core of optical fiber.