title: Low-nonlinearity single-transverse-mode ytterbium-doped photonic crystal fiber amplifier.
abstract: We report on an air-clad large-core single-transverse-mode ytterbium-doped photonic crystal fiber with a mode-field-diameter of 35 microm, corresponding to a mode-field-area of ~1000 microm(2). In a first experiment this fiber is used to amplify 10-ps pulses to a peak power of 60 kW without significant spectral broadening due to self-phase modulation allowing for the frequency up-conversion of these pulses using narrow-bandwidth phase matched nonlinear crystals.
authors.forename: J
authors.initials: J
authors.lastname: Limpert
authors.forename: A
authors.initials: A
authors.lastname: Liem
authors.forename: M
authors.initials: M
authors.lastname: Reich
authors.forename: T
authors.initials: T
authors.lastname: Schreiber
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.forename: H
authors.initials: H
authors.lastname: Zellmer
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann
authors.forename: J
authors.initials: J
authors.lastname: Broeng
authors.forename: A
authors.initials: A
authors.lastname: Petersson
authors.forename: C
authors.initials: C
authors.lastname: Jakobsen