Photoacoustic detection of oxygen using cantilever enhanced technique
| Autor: | Toni Laurila, Heidi Cattaneo, Rolf Hernberg |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Detection limit
Distributed feedback laser Tunable diode laser absorption spectroscopy Materials science Physics and Astronomy (miscellaneous) business.industry General Engineering General Physics and Astronomy Laser law.invention Vertical-cavity surface-emitting laser Semiconductor laser theory Optics law business Tunable laser Diode |
| Zdroj: | Applied Physics B. 85:337-341 |
| ISSN: | 1432-0649 0946-2171 |
| DOI: | 10.1007/s00340-006-2336-5 |
| Popis: | A tunable diode laser photoacoustic setup based on a recently demonstrated cantilever technique was used for sensitive detection of oxygen. As light sources, we used a distributed feedback (DFB) diode laser and a vertical-cavity surface-emitting (VCSEL) laser, both operating near 760 nm. With the 30 mW DFB laser a noise-equivalent detection limit of 20 ppm for oxygen was obtained, while a detection limit of 5 ‰ was achieved with the VCSEL having an output power of 0.5 mW. Our results yield a noise-equivalent sensitivity of 4.8×10-9 cm-1W Hz-1/2 and demonstrate the potential of this technique for compact and sensitive measurement of oxygen. |
| Databáze: | OpenAIRE |
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