Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy

Teemu Joonatan Tomberg; Tuomas Hieta; Markku Mikael Vainio; Lauri Olavi Halonen

doi:10.1039/C9AN00058E

Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy

Teemu Joonatan Tomberg, Tuomas Hieta, Markku Mikael Vainio, Lauri Olavi Halonen

Tutkimustuotos: Artikkelijulkaisu › Artikkeli › Tieteellinen › vertaisarvioitu

Abstrakti

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.

Alkuperäiskieli	englanti
Lehti	Analyst
Vuosikerta	144
Numero	7
Sivut	2291-2296
Sivumäärä	6
ISSN	0003-2654
DOI - pysyväislinkit	https://doi.org/10.1039/C9AN00058E
Tila	Julkaistu - 7 huhtikuuta 2019
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

116 Kemia

Pääsy asiakirjaan

10.1039/C9AN00058ELisenssi: CC BY-NC

c9an00058eLopullinen julkaistu versio, 1,09 MBLisenssi: CC BY-NC

Siteeraa tätä

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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.

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