title: Amplification of femtosecond laser filaments in Ti:sapphire.
abstract: Femtosecond laser filamentation is studied in a broadband amplifying medium, sapphire doped with electronically excited Ti ions. Evidence for fluence amplification of self-guided pulses, increase of filamentation length, as well as a lowering of the input laser power necessary for filamentation is reported.
authors.affiliation: Laboratoire d'Optique Appliquée, CNRS UMR 7639, Ecole Nationale Supérieure des Techniques Avancées, Ecole Polytechnique, Palaiseau, France.
authors.forename: J
authors.initials: J
authors.lastname: Philip
authors.forename: C
authors.initials: C
authors.lastname: D'Amico
authors.forename: G
authors.initials: G
authors.lastname: Chériaux
authors.forename: A
authors.initials: A
authors.lastname: Couairon
authors.forename: B
authors.initials: B
authors.lastname: Prade
authors.forename: A
authors.initials: A
authors.lastname: Mysyrowicz