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Opt Lett. 2014 Apr 1;39(7):2008-11. doi: 10.1364/OL.39.002008.

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.

PMID:
24686661
[PubMed]
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