Vortex solitons in an off-resonant Raman medium

Abstract

We investigate existence and linear stability of coupled vortex solitons supported by cascaded four-wave mixing in a Raman active medium excited away from the resonance. We present a detailed analysis for the two- and three-component vortex solitons and demonstrate the formation of stable and unstable vortex solitons, and associated spatio-temporal helical beams, under the conditions of the simultaneous frequency and vortex comb generation.

8 pages, 10 figures, to be published in Phys. Rev. A

References in corpus (4)

• Optical ferris wheel for ultracold atoms
• Nonlocal stabilization of nonlinear beams in a self-focusing atomic vapor
• Cascaded generation of multiply charged optical vortices and spatiotemporal helical beams in a Raman medium
• Spectral-discrete solitons and localization in frequency space