Abstract
We have improved the sensitivity of a state-of-the-art cantilever-enhanced photo-acoustic trace gas sensor by combining it with an optical power build-up cavity. The build-up cavity enhances the photo-acoustic signal by a factor of approximate to 100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 x 10(-12) W cm(-1) Hz(-1/2). We demonstrate the sensor platform in the 1530 nm wavelength range with a simple distributed feedback diode laser, achieving 75 ppt sensitivity for C2H2 with a 10 s integration time.
| Original language | English |
|---|---|
| Journal | Analyst |
| Volume | 144 |
| Issue number | 7 |
| Pages (from-to) | 2291-2296 |
| Number of pages | 6 |
| ISSN | 0003-2654 |
| DOIs | |
| Publication status | Published - 7 Apr 2019 |
| MoE publication type | A1 Journal article-refereed |
Fields of Science
- 116 Chemical sciences
Cite this
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Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy. / Tomberg, Teemu Joonatan; Hieta, Tuomas; Vainio, Markku Mikael; Halonen, Lauri Olavi.
In: Analyst, Vol. 144, No. 7, 07.04.2019, p. 2291-2296.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy
AU - Tomberg, Teemu Joonatan
AU - Hieta, Tuomas
AU - Vainio, Markku Mikael
AU - Halonen, Lauri Olavi
PY - 2019/4/7
Y1 - 2019/4/7
N2 - We have improved the sensitivity of a state-of-the-art cantilever-enhanced photo-acoustic trace gas sensor by combining it with an optical power build-up cavity. The build-up cavity enhances the photo-acoustic signal by a factor of approximate to 100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 x 10(-12) W cm(-1) Hz(-1/2). We demonstrate the sensor platform in the 1530 nm wavelength range with a simple distributed feedback diode laser, achieving 75 ppt sensitivity for C2H2 with a 10 s integration time.
AB - We have improved the sensitivity of a state-of-the-art cantilever-enhanced photo-acoustic trace gas sensor by combining it with an optical power build-up cavity. The build-up cavity enhances the photo-acoustic signal by a factor of approximate to 100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 x 10(-12) W cm(-1) Hz(-1/2). We demonstrate the sensor platform in the 1530 nm wavelength range with a simple distributed feedback diode laser, achieving 75 ppt sensitivity for C2H2 with a 10 s integration time.
KW - 116 Chemical sciences
U2 - 10.1039/C9AN00058E
DO - 10.1039/C9AN00058E
M3 - Article
VL - 144
SP - 2291
EP - 2296
JO - Analyst
JF - Analyst
SN - 0003-2654
IS - 7
ER -