title: Theory of photoionization-induced blueshift of ultrashort solitons in gas-filled hollow-core photonic crystal fibers.
abstract: We show theoretically that the photoionization process in a hollow-core photonic crystal fiber filled with a Raman-inactive noble gas leads to a constant acceleration of solitons in the time domain with a continuous shift to higher frequencies, limited only by ionization loss. This phenomenon is opposite to the well-known Raman self-frequency redshift of solitons in solid-core glass fibers. We also predict the existence of unconventional long-range nonlocal soliton interactions leading to spectral and temporal soliton clustering. Furthermore, if the core is filled with a Raman-active molecular gas, spectral transformations between redshifted, blueshifted, and stabilized solitons can take place in the same fiber.
authors.affiliation: Max Planck Institute for the Science of Light, Erlangen, Germany.
authors.forename: Mohammed F
authors.initials: MF
authors.lastname: Saleh
authors.forename: Wonkeun
authors.initials: W
authors.lastname: Chang
authors.forename: Philipp
authors.initials: P
authors.lastname: Hölzer
authors.forename: Alexander
authors.initials: A
authors.lastname: Nazarkin
authors.forename: John C
authors.initials: JC
authors.lastname: Travers
authors.forename: Nicolas Y
authors.initials: NY
authors.lastname: Joly
authors.forename: Philip St J
authors.initials: PS
authors.lastname: Russell
authors.forename: Fabio
authors.initials: F
authors.lastname: Biancalana