title: Megahertz optical parametric amplifier pumped by a femtosecond oscillator.
abstract: We demonstrate, for the first time to our knowledge, an optical parametric amplifier directly pumped by a femtosecond oscillator. Wavelength-tunable pulses in the ranges 0.65-0.85 microm (signal) and 1.4-2.5 microm (idler) are generated at a repetition frequency of 1 MHz. For pumping the beta-barium borate crystal we use a microjoule Yb:KY(WO4)2 femtosecond oscillator with cavity dumping. Pulses with 30 nJ of energy and a duration of 16 fs are achieved from a supercontinuum seed generated in a sapphire plate.
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Killi
authors.forename: Andy
authors.initials: A
authors.lastname: Steinmann
authors.forename: Guido
authors.initials: G
authors.lastname: Palmer
authors.forename: Uwe
authors.initials: U
authors.lastname: Morgner
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bartelt
authors.forename: Jens
authors.initials: J
authors.lastname: Kobelke