Radially symmetric and azimuthally modulated vortex solitons supported by localized gain

Details Radially symmetric and azimuthally modulated vortex solitons supported by localized gain Radially symmetric and azimuthally modulated vortex solitons supported by localized gain

2010-12-07

arxiv.org/abs/1012.1431v1

Optics Letters 36, 85 (2011)

Physics

Optics

11 pages, 4 figures, to appear in Optics Letters

Scientific paper

We discover that a spatially localized gain supports stable vortex solitons in media with cubic nonlinearity and two-photon absorption. The interplay between nonlinear losses and gain in amplifying rings results in suppression of otherwise ubiquitous azimuthal modulation instabilities of radially symmetric vortex solitons. We uncover that the topology of the gain profile imposes restrictions on the maximal possible charge of vortex solitons. Symmetry breaking occurs at high gain levels resulting in the formation of necklace vortex solitons composed of asymmetric bright spots.

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