Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Ultrakurze Laserpulse (Erzeugung I)
Q 39.3: Vortrag
Donnerstag, 13. März 2008, 11:30–11:45, 3H
Single-walled carbon nanotube saturable absorber mode-locked Yb:KLuW laser — •Andreas Schmidt1, Simon Rivier1, Günter Steinmeyer1, Valentin Petrov1, Uwe Griebner1, Jong H. Yim2, Won B. Cho2, Soonil Lee2, and Fabian Rotermund2 — 1Max-Born-Institut, Max-Born-Straße 2a, D-12489 Berlin, Germany — 2Division of Energy Systems Research, Ajou University, 443-749 Suwon, Korea
Recently, single-walled carbon nanotube saturable absorbers (SWCNT-SA) have gained much attention as a potential replacement for semiconductor-based ultrafast passive mode-lockers and limiters [1]. So far, SWCNT-SAs have been utilized to mode-lock lasers in the 1.5 µm wavelength range. Here we compare the mode-locked performance of an Yb:KLuW laser in the 1 µm spectral range employing a SWCNT-SA and a semiconductor saturable absorber mirror (SAM). Using an end-pumped configuration and placing the SAM in a z-shaped laser cavity, pulses as short as 83 fs are generated at a repetition rate of 94 MHz with a time-bandwith product of 0.32. Implementing the SWCNT-SA instead of the SAM in the cavity, nearly transform-limited pulses with a duration of 115 fs at 1047 nm in a soliton-like regime are obtained. The achieved pulse durations demonstrate the high potential of the low cost SWCNT-SA to serve as fast saturable absorber for mode locking applications in the 1–µm spectral range.
[1] Y.-C. Chen, et. al., Appl. Phys. Lett. 81, 975 (2002).