title: 1 MHz repetition rate hollow fiber pulse compression to sub-100-fs duration at 100 W average power.
abstract: We report on nonlinear pulse compression at very high average power. A high-power fiber chirped pulse amplification system based on a novel large pitch photonic crystal fiber delivers 700 fs pulses with 200 μJ pulse energy at a 1 MHz repetition rate, resulting in 200 W of average power. Subsequent spectral broadening in a xenon-filled hollow-core fiber and pulse compression with chirped mirrors is employed for pulse shortening and peak power enhancement. For the first time, to our knowledge, more than 100 W of average power are transmitted through a noble-gas-filled hollow fiber. After pulse compression of 81 fs, 93 μJ pulses are obtained at a 1 MHz repetition rate.
authors.affiliation: Institute of Applied Physics, Friedrich-Schiller-University Jena, Albert-Einstein-Strasse 15, 07745 Jena, Germany. jan.rothhardt@uni‐jena.de
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
authors.forename: Steffen
authors.initials: S
authors.lastname: Hädrich
authors.forename: Henning
authors.initials: H
authors.lastname: Carstens
authors.forename: Nicholas
authors.initials: N
authors.lastname: Herrick
authors.forename: Stefan
authors.initials: S
authors.lastname: Demmler
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann