https://doi.org/10.1051/epjconf/201819003015
Multifocus self-focusing of a femtosecond optical vortex
Lomonosov Moscow State University, Faculty of Physics and International Laser Center, 119991, Moscow, Russia
* Corresponding author: vasilev.evgeniy@physics.msu.ru
Published online: 26 September 2018
We analyze formation of multifocus structure during the propagation of optical vortex with topological charge m = 1 in fused silica at wavelength 1800 nm, which corresponds to region of anomalous group velocity dispersion. Propagation of pulse is accompanied by sequence of nonlinear focuses, where each focus is a high intensive ring.
© The Authors, published by EDP Sciences, 2018
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