title: SESAMs for high-power femtosecond modelocking: power scaling of an Yb:LuScO₃ thin disk laser to 23 W and 235 fs.
abstract: We report on power scaling of a modelocked thin disk laser based on the broadband mixed sesquioxide material Yb:LuScO₃. One of the key elements to achieve this result was an improved SESAM design with reduced two-photon-absorption (TPA) and high damage threshold. In a first experiment, using a standard antiresonant SESAM with no topcoating, we could demonstrate record short pulse durations of 195 fs at a moderate average power of 9.5 W. Furthermore, we were able to power scale our thin disk laser while keeping the pulses short reaching 23 W at a pulse duration of 235 fs. This was made possible by designing a new SESAM with multiple quantum wells (QW) and a suitable dielectric topcoating. We will present SESAM optimization guidelines for short pulse generation from high-power modelocked oscillators.
authors: Department of Physics, Institute for Quantum Electronics, ETH Zürich, Wolfgang-Pauli-Strasse 16, 8093 Zürich, Switzerland. saraceno@phys.ethz.ch
authors: Clara J
authors: CJ
authors: Saraceno
authors: Oliver H
authors: OH
authors: Heckl
authors: Cyrill R E
authors: CR
authors: Baer
authors: Matthias
authors: M
authors: Golling
authors: Thomas
authors: T
authors: Südmeyer
authors: Kolja
authors: K
authors: Beil
authors: Christian
authors: C
authors: Kränkel
authors: Klaus
authors: K
authors: Petermann
authors: Günter
authors: G
authors: Huber
authors: Ursula
authors: U
authors: Keller