title: Control of the collapse distance in atmospheric propagation.
abstract: We show experimentally for ultrashort laser pulses propagating in air, that the collapse/filamentation distance of intense laser pulses in the atmosphere can be extended and controlled with a simple double-lens setup. We derive a simple formula for the filamentation distance, and confirm its agreement with the experimental results. We also observe that delaying the onset of filamentation increases the filament length.
authors.forename: Gadi
authors.initials: G
authors.lastname: Fibich
authors.forename: Yonatan
authors.initials: Y
authors.lastname: Sivan
authors.forename: Yosi
authors.initials: Y
authors.lastname: Ehrlich
authors.forename: Einat
authors.initials: E
authors.lastname: Louzon
authors.forename: Moshe
authors.initials: M
authors.lastname: Fraenkel
authors.forename: Shmuel
authors.initials: S
authors.lastname: Eisenmann
authors.forename: Yiftach
authors.initials: Y
authors.lastname: Katzir
authors.forename: Arie
authors.initials: A
authors.lastname: Zigler