Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy

Teemu Tomberg; Tuomas Hieta; Markku Vainio; Lauri Halonen

doi:10.1039/C9AN00058E

Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy

Teemu Tomberg
, Tuomas Hieta
, Markku Vainio
, Lauri Halonen

Research output: Contribution to journal › Article › Scientific › peer-review

44 Citations (Scopus)

14 Downloads (Pure)

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 ∼100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 × 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
Pages (from-to)	2291-2296
Number of pages	6
Journal	Analyst
Volume	144
DOIs	https://doi.org/10.1039/C9AN00058E
Publication status	Published - 28 Feb 2019
Publication type	A1 Journal article-refereed

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10.1039/C9AN00058ELicence: CC BY

Cavity-enhanced cantilever-enhanced 2019Final published version, 1.09 MBLicence: CC BY

http://urn.fi/URN:NBN:fi:tuni-202003032475Licence: CC BY

Cite this

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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 ∼100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 × 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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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 ∼100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 × 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 ∼100, resulting in an exceptionally good normalised noise equivalent absorption (NNEA) value of 1.75 × 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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Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy

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