Paper A58

Observation of polychromatic vortex solitons

Dragomir N. Neshev, Alexander Dreischuh, Vladlen Shvedov, Anton S. Desyatnikov, Wieslaw Krolikowski, Yuri S. Kivshar

Abstract.

We demonstrate experimentally the formation of polychromatic single- and double-charge optical vortex solitons by employing a lithium niobate crystal as a nonlinear medium with defocusing nonlinearity. We study the wavelength dependence of the vortex core localization and observe self-trapping of polychromatic vortices with a bandwidth spanning over more than 70 nm for single-charge and 180 nm for double-charge vortex solitons.