Konstanz 1998 – wissenschaftliches Programm

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Q: Quantenoptik

Q 15: Erzeugung ultrakurzer Pulse II

Q 15.1: Fachvortrag

Dienstag, 17. März 1998, 14:00–14:30, P 603

Neueste Entwicklungen bei der Erzeugung ultrakurzer Pulse — •U. Keller — Institute of Quantum Electronics, ETH–Zürich, Schweiz

Solid–state lasers still provide some of the best laser qualities in terms of high–quality spatial modes, high output power, energy storage and large pulse energy when Q-switched, and large optical bandwidth necessary for ultrashort pulse generation. Combined with high power diode pump lasers, passive modelocking or Q–switching of solid–state lasers with semiconductor saturable absorber mirrors (SESAMs) forms a promising basis for an all–solid–state ultrafast laser technology. SESAMs have allowed us to push a number of keys limits in laser performance. Presently, we have demonstrated 300nm tunability of 30 fs pulses with a single set of mirrors and pulses as short as 6.5 fs duration directly from a Ti:sapphire laser without any further pulse compression. Broadband higher order dispersion compensation was obtained with double chirped mirrors. We have also demonstrated the shortest Q–switched pulses of 37 ps duration from a solid–state laser. In addition, we have generated the highest reported average powers in diode-pumped mode-locked femtosecond Cr:LiSAF and Nd:glass lasers.