Georgi Maleshkov, Dragomir N. Neshev, Elitza Petrova, and Alexander Dreischuh
Abstract.
We study numerically and experimentally the propagation of pulsed singular beams, including dark crosses and optical vortices, in self-focusing nonlinear media, resulting in filamentation and supercontinuum generation. Our results show that the singular beams survive the process of modulation instability and appear well preserved in both the near and far-field.