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MO: Fachverband Molekülphysik
MO 23: Molekülphysik Poster 2
MO 23.11: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 8 Foyer
Development of broadly tunable cw narrowband mid-IR laser source for molecular spectroscopy — •Sergey Vasilyev1, Stephan Schiller1, Alexander Nevsky1, Arnaud Grisard2, David Faye2, Eric Lallier2, Zhaowei Zhang3, Morten Ibsen3, Andrew Clarkson3, Peter Kaspersen4, Axel Bohman4, and Peter Geiser4 — 1Institut für Experimentalphysik, Universität Düsseldorf, 40225 Düsseldorf, Germany — 2Thales Research and Technology, 91767 Palaiseau cedex, France — 3Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK — 4Norsk Elektro Optikk A/S, N-1473 Lørenskog, Norway
We are developing a continuous-wave, widely tunable, single frequency mid-IR laser source based on a down conversion of 1.5-2.0 μm laser radiation to mid-IR spectral region using difference frequency generation (DFG) and optical parametric generation (OPO) in a Orientation-Patterned Gallium Arsenide (OP-GaAs) crystals.
A mid-IR source with sub-mW output based on DFG between a narrowband broadly tunable high power EDFA and a thulium doped fiber laser MOPA has been developed [1]. DFG output wavelength was tunable via computer control in 7.6-8.2 μm range with the picometer precision. The DFG source was integrated in a compact multi-gas spectrometer for environmental gas sensing applications.
We are currently upgrading the DFG source to higher output power and broader tuning range, and exploring the cw OP-GaAs OPO source using a high power (10 W) Tm- fiber laser pumping.
[1] S.Vasilyev et al., Optics Letters 33, 413 (2008)