Prefer a chat interface with context about you and your work?
Stable radially symmetric and azimuthally modulated vortex solitons supported by localized gain
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 the suppression of otherwise ubiquitous azimuthal modulation instabilities of radially symmetric vortex solitons. We find that the topology of …