Hannover 2003 – scientific programme
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Q: Quantenoptik
Q 24: Poster: Nichtlineare Optik
Q 24.7: Poster
Tuesday, March 25, 2003, 16:30–18:30, Lichthof
Tunable picosecond laser pulses in the mid-IR — •Klaus Finsterbusch1, Reiner Urschel2, Andreas Bayer1, and Helmut Zacharias1 — 1Physikalisches Institut, Westfälische Wilhelms-Universität Münster — 2LINOS Photonics GmbH & Co. KG, Isartalstraße 43, D-80469 München
Sources of tunable high-quality, ultra-short laser pulses in the near- and mid-infrared are an important tool in various fields of optical spectroscopy. Pulses in the picosecond domain offer the possibility of good spectral resolution while retaining a high conversion efficiency. We built a tunable source of picosecond laser pulses which completely covers the wavelength range between 1.5 and 24 µm via optical parametric amplification (OPA) and difference frequency generation (DFG). The laser system is based on a Nd:YLF oscillator / amplifier system operating at 1053 nm. The high-quality signal pulses of an PPLN OPO, pumped by the Nd:YLF oscillator, are amplified in KTP to energies of about 500 µJ. In the last conversion stage the signal and idler pulses of the OPA are difference frequency mixed in GaSe and CdSe generating mid-IR radiation up to 24 µm.