title: 160 W 800 fs Yb:YAG single crystal fiber amplifier without CPA.
abstract: We demonstrate a compact and simple two-stage Yb:YAG single crystal fiber amplifier which delivers 160 W average power, 800 fs pulses without chirped pulse amplification. This is the highest average power of femtosecond laser based on SCF. Additionally, we demonstrate the highest small signal gain of 32.5 dB from the SCF in the first stage and the highest extraction efficiency of 42% in the second stage. The excellent performance of the second stage was obtained using the bidirectional pumping scheme, which is applied to SCF for the first time.
authors.forename: Vesna
authors.initials: V
authors.lastname: Markovic
authors.forename: Andreas
authors.initials: A
authors.lastname: Rohrbacher
authors.forename: Peter
authors.initials: P
authors.lastname: Hofmann
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Pallmann
authors.forename: Simonette
authors.initials: S
authors.lastname: Pierrot
authors.forename: Bojan
authors.initials: B
authors.lastname: Resan