Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Ultrakurze Pulse: Erzeugung III
Q 15.7: Vortrag
Dienstag, 3. März 2009, 12:00–12:15, Audi-A
Single crystal Yb:LuScO3 laser mode-locked by a single-walled carbon nanotube saturable absorber
— •Andreas Schmidt1, Günter Steinmeyer1, Valentin Petrov1, Uwe Griebner1, Jong Hyuk Yim2, Won Bae Cho2, Soonil Lee2, Fabian Rotermund2, Rigo Peters3, Klaus Petermann3, and Günter Huber3 — 1Max-Born-Institut, D-12489 Berlin, Germany — 2Ajou University, 443-749 Suwon, Korea — 3Institut für Laser-Physik, Universität Hamburg, D-22761 Hamburg, Germany
Mode-locking of the disordered cubic sesquioxide crystal Yb:LuScO3 using a single-walled carbon nanotube saturable absorber (SWCNT-SA) is demonstrated under diode pumping and compared with passive mode-locking by a commercial semiconductor saturable absorber mirror (SESAM). Around 1 µm, passive mode-locking using SWCNT-SAs was demonstrated for Yb-doped double tungstate lasers (Yb:KLuW, Yb:KYW) [1]. Using a SWCNT-SA directly deposited on a dielectric mirror for passive mode-locking of an Yb:LuScO3 laser, nearly transform-limited pulses with a duration of 306 fs were achieved. The comparison with SESAM mode-locking indicates the directions for future optimization of the SWCNT-SA parameters. The shortest pulse duration of 125 fs for Yb-doped SESAM mode-locked sesquioxide lasers confirms our approach of introducing mixed sesquioxide hosts to profit from their increased gain bandwidth compared to the sesquioxide crystals without compositional disorder.
[1] A. Schmidt, et. al., Opt. Lett. 33, 729 (2008).