title: From X- to O-shaped spatiotemporal spectra of light filaments in water.
abstract: 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.
authors.affiliation: Departamento de Física Aplicada, ETSIM, Universidad Politécnica de Madrid, Rios Rosas 21, 28003 Madrid, Spain. miguelangel.porras@upm.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Porras
authors.forename: Audrius
authors.initials: A
authors.lastname: Dubietis
authors.forename: Ernestas
authors.initials: E
authors.lastname: Kucinskas
authors.forename: Francesca
authors.initials: F
authors.lastname: Bragheri
authors.forename: Vittorio
authors.initials: V
authors.lastname: Degiorgio
authors.forename: Arnaud
authors.initials: A
authors.lastname: Couairon
authors.forename: Daniele
authors.initials: D
authors.lastname: Faccio
authors.forename: Paolo
authors.initials: P
authors.lastname: Di Trapani