Ultraviolet-visible conical emission by multiple laser filaments.
We characterized the angular distribution of the supercontinuum emission from multiple infrared laser filaments propagating in air over long distances, from the infrared (1080 nm) to ultraviolet (225 nm). These experimental data suggest that the X-Waves modeling or Cerenkov emission, rather than phase matching of four-wave mixing, could explain the conical emission. We also estimate the total light conversion efficiency from the original laser wavelength into the white-light continuum.
Maioli
Paolo
P
Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bâtiment A. Kastler, 43 boulevard du 11 novembre 1918, F-69622 Villeurbanne, France. paolo.maioli@lasim.univ-lyon1.fr
Salamé
Rami
R
Lascoux
N
N
Salmon
E
E
Béjot
P
P
Kasparian
J
J
Wolf
J-P
JP