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

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

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	https://doi.org/10.1039/C9AN00058E
Publication status	Published - 7 Apr 2019
MoE publication type	A1 Journal article-refereed

Fields of Science

116 Chemical sciences

Access to Document

10.1039/C9AN00058ELicence: CC BY-NC

c9an00058eFinal published version, 1.09 MBLicence: CC BY-NC

Cite this

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title = "Cavity-enhanced cantilever-enhanced photo-acoustic spectroscopy",

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.",

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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.

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