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Room-temperature diode laser photoacoustic spectroscopy near 2.3 μm |
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| Authors: | S. Civiš V. Horká J. Cihelka T. Šimeček E. Hulicius J. Oswald J. Pangrác A. Vicet Y. Rouillard A. Salhi C. Alibert R. Werner J. Koeth |
| Affiliation: | (1) J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic;(2) Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 53 Prague 6, Czech Republic;(3) Centre d’Electronique et de Microoptoeléctronique de Montpellier (CEM2 UMR CNRS 5507), Université Montpellier II, 34095 Montpellier, Cedex 05, France;(4) Nanopluis Nanosystems and Technology GmbH, Oberer Kirchberg 4, 97218 Gerbrunn, Germany |
| Abstract: | We describe results obtained with a new type of GaSb-based semiconductor distributed feedback multiple quantum well lasers operating in continuous-wave mode at room temperature and above. The lasers show good tunability both by the excitation current and the temperature from -1 °C to +60 °C (4170 to 4360 cm-1). They operate in a high-power (more than 1 mW) single-mode regime and can be tuned without hopping in the methane and ammonia absorption spectral range of up to 15 cm-1. Application to photoacoustic detection is also described. Potential use lies in the areas of analytical chemistry of gases and in atmospheric pollution research. PACS 82.80.Kq; 42.62.Fi; 42.55.Px |
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