Observation of conical waves in focusing, dispersive, and dissipative Kerr media.
Excitation of unbalanced-Bessel beams by a gradual increase of nonlinearity in a water sample outlines the achievement of the first ever observed quasimonochromatic wave packet that propagates stably for hundreds of Rayleigh lengths in a focusing and dispersive Kerr medium, i.e., in the absence of spectral broadening and conical emission. A modulational instability analysis reveals the key role of nonlinear dissipation in quenching the growth of spatiotemporal unstable modes.
Polesana
P
P
Department of Quantum Electronics, Vilnius University, Sauletekio Avenue 9, LT-10222 Vilnius, Lithuania.
Couairon
A
A
Faccio
D
D
Parola
A
A
Porras
M A
MA
Dubietis
A
A
Piskarskas
A
A
Di Trapani
P
P