From X- to O-shaped spatiotemporal spectra of light filaments in water.
We show that the angle-wavelength spectra of light filaments excited by ultrashort pulses experience a transition from X- to O-like structures when their carrier wavelengths are switched from normal to anomalous dispersion. Calculations confirm that the O-shaped conical emission follows the elliptic geometry of the nonlinear Schrödinger equation with anomalous dispersion.
Porras
Miguel A
MA
Departamento de Física Aplicada, ETSIM, Universidad Politécnica de Madrid, Rios Rosas 21, 28003 Madrid, Spain. miguelangel.porras@upm.es
Dubietis
Audrius
A
Kucinskas
Ernestas
E
Bragheri
Francesca
F
Degiorgio
Vittorio
V
Couairon
Arnaud
A
Faccio
Daniele
D
Di Trapani
Paolo
P