title: Diffraction-arrested soliton self-frequency shift of few-cycle laser pulses in a photonic-crystal fiber.
abstract: The balance between diffraction and index-step guiding in photonic-crystal fibers is controlled by modifying the fiber structure, leading to different wavelength dependences of the effective mode area and providing a mechanism to control nonlinear-optical phenomena. In optical fibers with a steep profile, the guided mode of the light field tends to become much less compact with an increase in radiation wavelength, slowing down the Raman-induced soliton self-frequency shift of an ultrashort laser pulse. A reduction of the soliton self-frequency shift is demonstrated for input laser pulses.
authors.affiliation: Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Vorob'evy gory, Moscow 119992, Russia.
authors.forename: E E
authors.initials: EE
authors.lastname: Serebryannikov
authors.forename: A M
authors.initials: AM
authors.lastname: Zheltikov
authors.forename: S
authors.initials: S
authors.lastname: Köhler
authors.forename: N
authors.initials: N
authors.lastname: Ishii
authors.forename: C Y
authors.initials: CY
authors.lastname: Teisset
authors.forename: T
authors.initials: T
authors.lastname: Fuji
authors.forename: F
authors.initials: F
authors.lastname: Krausz
authors.forename: A
authors.initials: A
authors.lastname: Baltuska