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- Title
Photoacoustic detection of oxygen using cantilever enhanced technique.
- Authors
Cattaneo, H.; Laurila, T.; Hernberg, R.
- Abstract
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.
- Subjects
PHOTOACOUSTIC spectroscopy; LASER spectroscopy; DIODES; LASERS; ELECTRONIC feedback; OXYGEN
- Publication
Applied Physics B: Lasers & Optics, 2006, Vol 11, Issue 2/3, p337
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-006-2336-5