title: Two-color optically synchronized ultrashort pulses from a Tm/Yb-co-doped fiber amplifier.
abstract: A method of producing high quality, optically synchronized two-color ultrashort pulses in an active thulium-doped fiber is proposed. We show that sech-shaped femtosecond pulses with essentially different wavelengths can be generated directly from a Tm/Yb-co-doped amplifier: one pulse at about 2 μm and the second pulse with a tunable wavelength up to 2.3 μm, which covers the pump and gain regions of Cr:ZnSe and Cr:ZnS amplifiers. The shortest pulses with durations of 145 fs at 2.25 μm and 125 fs at 2 μm were measured by the FROG (frequency-resolved optical gating) technique.
authors.forename: M Yu
authors.initials: MY
authors.lastname: Koptev
authors.forename: E A
authors.initials: EA
authors.lastname: Anashkina
authors.forename: A V
authors.initials: AV
authors.lastname: Andrianov
authors.forename: S V
authors.initials: SV
authors.lastname: Muravyev
authors.forename: A V
authors.initials: AV
authors.lastname: Kim