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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