Broadband photoacoustic spectroscopy of 14CH4 with a high-power mid-infrared optical frequency comb

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Karhu , J , Tomberg , T , Senna Vieira , F , Genoud , G , Hänninen , V , Vainio , M , Metsälä , M , Hieta , T , Bell , S & Halonen , L 2019 , ' Broadband photoacoustic spectroscopy of 14CH4 with a high-power mid-infrared optical frequency comb ' , Optics Letters , vol. 44 , no. 5 , pp. 1142-1145 . https://doi.org/10.1364/OL.44.001142

Title: Broadband photoacoustic spectroscopy of 14CH4 with a high-power mid-infrared optical frequency comb
Author: Karhu, Juho; Tomberg, Teemu; Senna Vieira, Francisco; Genoud, Guillaume; Hänninen, Vesa; Vainio, Markku; Metsälä, Markus; Hieta, Tuomas; Bell, Steven; Halonen, Lauri
Contributor organization: Department of Chemistry
Molecular Science
Date: 2019-03-01
Language: eng
Number of pages: 4
Belongs to series: Optics Letters
ISSN: 0146-9592
DOI: https://doi.org/10.1364/OL.44.001142
URI: http://hdl.handle.net/10138/312056
Abstract: We report a photoacoustic spectroscopy setup with a high-power mid-infrared frequency comb as the light source. The setup is used in broadband spectroscopy of radiocarbon methane. Owing to the high sensitivity of a cantilever-enhanced photoacoustic cell and the high-power light source, we can reach a detection limit below 100 ppb in a broadband measurement with a sample volume of only a few milliliters. The first infrared spectrum of 14CH4 is reported and given a preliminary assignment. The results lay a foundation for the development of optical detection systems for radiocarbon methane.We report a photoacoustic spectroscopy setup with a high-power mid-infrared frequency comb as the light source. The setup is used in broadband spectroscopy of radiocarbon methane. Owing to the high sensitivity of a cantilever-enhanced photoacoustic cell and the high-power light source, we can reach a detection limit below 100 ppb in a broadband measurement with a sample volume of only a few milliliters. The first infrared spectrum of (CH4)-C-14 is reported and given a preliminary assignment. The results lay a foundation for the development of optical detection systems for radiocarbon methane. (c) 2019 Optical Society of America
Subject: RADIOCARBON DIOXIDE
C-14
116 Chemical sciences
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: acceptedVersion


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