We show that ringlike localized gain landscapes imprinted in focusing cubic (Kerr) nonlinear media with strong two-photon absorption support new types of stable higher-order vortex solitons containing multiple phase singularities nested inside a single core. The phase singularities are found to rotate around the center of the gain landscape, with the rotation period being determined by the strength of the gain and the nonlinear absorption.
© 2011 Optical Society of America
Original Manuscript: March 24, 2011
Manuscript Accepted: April 12, 2011
Published: May 17, 2011
Olga V. Borovkova, Valery E. Lobanov, Yaroslav V. Kartashov, and Lluis Torner, "Rotating vortex solitons supported by localized gain," Opt. Lett. 36, 1936-1938 (2011)