title: 42-fs diode-pumped Yb:Ca4YO(BO3)3 oscillator.
abstract: We demonstrate a passively mode-locked femtosecond laser based on the self-frequency-doubling crystal Yb:Ca4YO(BO3)3. The oscillator is pumped by a novel two-section distributed Bragg-reflector tapered diode-laser. Pulses as short as 46 fs and 42 fs at 1050 nm are achieved for the E//Z polarization without and with external compression, respectively. These are, to the best of our knowledge, the shortest pulses obtained from an oscillator based on Yb3+-doped bulk material.
authors.affiliation: Max Born Institute, Max-Born-Str. 2a, D-12489 Berlin, Germany.
authors.forename: Akira
authors.initials: A
authors.lastname: Yoshida
authors.forename: Andreas
authors.initials: A
authors.lastname: Schmidt
authors.forename: Huaijin
authors.initials: H
authors.lastname: Zhang
authors.forename: Jiyang
authors.initials: J
authors.lastname: Wang
authors.forename: Junhai
authors.initials: J
authors.lastname: Liu
authors.forename: Christian
authors.initials: C
authors.lastname: Fiebig
authors.forename: Katrin
authors.initials: K
authors.lastname: Paschke
authors.forename: Götz
authors.initials: G
authors.lastname: Erbert
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov
authors.forename: Uwe
authors.initials: U
authors.lastname: Griebner