title: Self-focusing Distance of Very High Power Laser Pulses.
abstract: We show numerically for continuous-wave beams and experimentally for femtosecond pulses propagating in air, that the collapse distance of intense laser beams in a bulk Kerr medium scales as 1/P;1/2 for input powers P that are moderately above the critical power for self focusing, but that at higher powers the collapse distance scales as 1/P.
authors.forename: Gadi
authors.initials: G
authors.lastname: Fibich
authors.forename: Shmuel
authors.initials: S
authors.lastname: Eisenmann
authors.forename: Boaz
authors.initials: B
authors.lastname: Ilan
authors.forename: Yossi
authors.initials: Y
authors.lastname: Erlich
authors.forename: Moshe
authors.initials: M
authors.lastname: Fraenkel
authors.forename: Zohar
authors.initials: Z
authors.lastname: Henis
authors.forename: Alexander
authors.initials: A
authors.lastname: Gaeta
authors.forename: Arie
authors.initials: A
authors.lastname: Zigler