title: Nonlinear compression of an ultrashort-pulse thulium-based fiber laser to sub-70  fs in Kagome photonic crystal fiber.
abstract: Nonlinear pulse compression of ultrashort pulses is an established method for reducing the pulse duration and increasing the pulse peak power beyond the intrinsic limits of a given laser architecture. In this proof-of-principle experiment, we demonstrate nonlinear compression of the pulses emitted by a high-repetition-rate thulium-based fiber CPA system. The initial pulse duration of about 400 fs has been shortened to <70  fs with 19.7 μJ of pulse energy, which corresponds to about 200 MW of pulse peak power.
authors.forename: M
authors.initials: M
authors.lastname: Gebhardt
authors.forename: C
authors.initials: C
authors.lastname: Gaida
authors.forename: S
authors.initials: S
authors.lastname: Hädrich
authors.forename: F
authors.initials: F
authors.lastname: Stutzki
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