title: Femtosecond nonlinear fiber optics in the ionization regime.
abstract: By using a gas-filled kagome-style photonic crystal fiber, nonlinear fiber optics is studied in the regime of optically induced ionization. The fiber offers low anomalous dispersion over a broad bandwidth and low loss. Sequences of blueshifted pulses are emitted when 65 fs, few-microjoule pulses, corresponding to high-order solitons, are launched into the fiber and undergo self-compression. The experimental results are confirmed by numerical simulations which suggest that free-electron densities of ∼10(17) cm(-3) are achieved at peak intensities of 10(14) W/cm(2) over length scales of several centimeters.
authors.affiliation: Max Planck Institute for the Science of Light, Erlangen, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Hölzer
authors.forename: W
authors.initials: W
authors.lastname: Chang
authors.forename: J C
authors.initials: JC
authors.lastname: Travers
authors.forename: A
authors.initials: A
authors.lastname: Nazarkin
authors.forename: J
authors.initials: J
authors.lastname: Nold
authors.forename: N Y
authors.initials: NY
authors.lastname: Joly
authors.forename: M F
authors.initials: MF
authors.lastname: Saleh
authors.forename: F
authors.initials: F
authors.lastname: Biancalana
authors.forename: P St J
authors.initials: PS
authors.lastname: Russell