title: Chirp-induced dynamics of femtosecond filaments in air.
abstract: We investigate the influence of a chirped phase on femtosecond pulses propagating in air. Pulses with an initially negative chirp are temporally compressed by compensation with group-velocity dispersion. We demonstrate that this property, combined with plasma defocusing, can be used to trigger filamentation at different foci, increase self-guiding ranges, or even shorten pulse duration.
authors.affiliation: Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique, Direction des Applications Militaires--Ile de France, BP 12, 91680 Bruyères-le-Châtel, France. rachel.nuter@cea.fr
authors.forename: Rachel
authors.initials: R
authors.lastname: Nuter
authors.forename: Stefan
authors.initials: S
authors.lastname: Skupin
authors.forename: Luc
authors.initials: L
authors.lastname: Bergé