Diode laser-based photoacoustic spectroscopy with interferometrically-enhanced cantilever detection
| Autor: | V. Koskinen, Jyrki Kauppinen, Toni Laurila, Rolf Hernberg, Heidi Cattaneo |
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| Rok vydání: | 2009 |
| Předmět: |
Photoacoustic effect
Distributed feedback laser Materials science Tunable diode laser absorption spectroscopy business.industry Laser Atomic and Molecular Physics and Optics Vertical-cavity surface-emitting laser law.invention Optics law Ultrafast laser spectroscopy Optoelectronics business Photoacoustic spectroscopy Tunable laser |
| Zdroj: | Optics express. 13(7) |
| ISSN: | 1094-4087 |
| Popis: | A novel sensitive approach to detect weak pressure variations has been applied to tunable diode laser-based photoacoustic spectroscopy. The sensing device consists of a miniature silicon cantilever, the deflection of which is detected with a compact Michelson-type interferometer. The photoacoustic system has been applied to the detection of carbon dioxide (CO2) at 1572 nm with a distributed feedback diode laser. A noise equivalent sensitivity of 2.8 x 10-10 cm-1WHz-1/2 was demonstrated. Potential improvements of the technique are discussed. |
| Databáze: | OpenAIRE |
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