Light filaments without self-channeling.
The propagation of intense 200 fs pulses in water reveals light filaments not sustained by static balance between Kerr-induced self-focusing and plasma-induced defocusing. Numerical calculations outline the occurrence of a possible scenario where filaments appear because of spontaneous reshaping of the Gaussian input beam into a conical wave, driven by the requirement of maximum localization, maximum stationarity, and minimum nonlinear losses.
Dubietis
Audrius
A
Department of Quantum Electronics, Vilnius University, Sauletekio 9, LT-2040 Vilnius, Lithuania.
Gaizauskas
Eugenijus
E
Tamosauskas
Gintaras
G
Di Trapani
Paolo
P