title: High average power nonlinear compression to 4  GW, sub-50  fs pulses at 2  μm wavelength.
abstract: The combination of high-repetition-rate ultrafast thulium-doped fiber laser systems and gas-based nonlinear pulse compression in waveguides offers promising opportunities for the development of high-performance few-cycle laser sources at 2 μm wavelength. In this Letter, we report on a nonlinear pulse compression stage delivering 252 μJ, sub-50 fs-pulses at 15.4 W of average power. This performance level was enabled by actively mitigating ultrashort pulse propagation effects induced by the presence of water vapor absorptions.
authors.forename: M
authors.initials: M
authors.lastname: Gebhardt
authors.forename: C
authors.initials: C
authors.lastname: Gaida
authors.forename: F
authors.initials: F
authors.lastname: Stutzki
authors.forename: S
authors.initials: S
authors.lastname: Hädrich
authors.forename: C
authors.initials: C
authors.lastname: Jauregui
authors.forename: J
authors.initials: J
authors.lastname: Limpert
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann