Abstract
Highly sensitive cantilever-enhanced photoacoustic detection of hydrogen cyanide and methane in the mid-infrared region is demonstrated. A mid-infrared continuous-wave frequency tunable optical parametric oscillator was used as a light source in the experimental setup. Noise equivalent detection limits of 190 ppt (1 s) and 65 ppt (30 s) were achieved for HCN and CH4, respectively. The normalized noise equivalent absorption coefficient is 1.8 × 10−9 W cm−1 Hz−1/2.
| Original language | English |
|---|---|
| Pages (from-to) | 10240-10250 |
| Number of pages | 10 |
| Journal | Optics Express |
| Volume | 21 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- spectroscopy
- photothermal
- parametric oscillators
- laser sensors
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Peltola, J., Vainio, M., Hieta, T., Uotila, J., Sinisalo, S., Metsälä, M., Siltanen, M., & Halonen, L. (2013). High sensitivity trace gas detection by cantilever-enhanced photoacoustic spectroscopy using a mid-infrared continuous-wave optical parametric oscillator. Optics Express, 21(8), 10240-10250. https://doi.org/10.1364/OE.21.010240