title: Dual-gain SESAM modelocked thin disk laser based on Yb:Lu₂O₃ and Yb:Sc₂O₃.
abstract: We present for the first time a SESAM-modelocked thin-disk laser (TDL) that incorporates two gain materials with different emission spectra in a single TDL resonator. The two gain media used in this experiment are the sesquioxide materials Yb:Lu2O3 and Yb:Sc2O3, which have their spectral emission peak displaced by ≈7 nm. We can benefit from a combined gain bandwidth that is wider than the one provided by a single gain material alone and still conserve the excellent thermal properties of each disk. In these first proof-of-principle experiments we demonstrate pulse durations shorter than previously achieved with the single gain material Yb:Lu2O3. The oscillator generates pulses as short as 103 fs at a repetition rate of 41.7 MHz and a center wavelength of around 1038 nm, with an average output power of 1.4 W. A different cavity layout provides pulses with a duration of 124 fs at an output power of 8.6 W. This dual-gain approach should allow for further power scaling of TDLs and these first results prove this method to be a promising new way to combine the record output-power performance of modelocked TDLs with short pulse durations in the sub-100 fs regime.
authors.forename: Cinia
authors.initials: C
authors.lastname: Schriber
authors.forename: Florian
authors.initials: F
authors.lastname: Emaury
authors.forename: Andreas
authors.initials: A
authors.lastname: Diebold
authors.forename: Sandro
authors.initials: S
authors.lastname: Link
authors.forename: Matthias
authors.initials: M
authors.lastname: Golling
authors.forename: Kolja
authors.initials: K
authors.lastname: Beil
authors.forename: Christian
authors.initials: C
authors.lastname: Kränkel
authors.forename: Clara J
authors.initials: CJ
authors.lastname: Saraceno
authors.forename: Thomas
authors.initials: T
authors.lastname: Südmeyer
authors.forename: Ursula
authors.initials: U
authors.lastname: Keller