title: Guing of intense femtosecond pulses in preformed plasma channels.
abstract: We report guiding of sub-100-fs pulses at intensities up to 5x10(15) W/cm (2) over a distance of 1 cm in a preformed plasma channel. The width of the guided pulse was shortened, which we attribute to ionization-induced refraction at the channel entrance. A pulse energy throughput of 30% in the lowest-order was measured.
authors.forename: S P
authors.initials: SP
authors.lastname: Nikitin
authors.forename: T M
authors.initials: TM
authors.lastname: Antonsen
authors.forename: T R
authors.initials: TR
authors.lastname: Clark
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: H M
authors.initials: HM
authors.lastname: Milchberg