Paper A58

Observation of polychromatic vortex solitons

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


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.