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

Juho Karhu; Teemu Tomberg; Francisco Senna Vieira; Guillaume Genoud; Vesa Hänninen; Markku Vainio; Markus Metsälä; Tuomas Hieta; Steven Bell; Lauri Halonen

doi:10.1364/OL.44.001142

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

Juho Karhu, Teemu Tomberg, Francisco Senna Vieira, Guillaume Genoud, Vesa Hänninen, Markku Vainio, Markus Metsälä, Tuomas Hieta, Steven Bell, Lauri Halonen

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

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.

Original language	English
Journal	Optics Letters
Volume	44
Issue number	5
Pages (from-to)	1142-1145
Number of pages	4
ISSN	0146-9592
DOIs	https://doi.org/10.1364/OL.44.001142
Publication status	Published - 1 Mar 2019
MoE publication type	A1 Journal article-refereed

Fields of Science

RADIOCARBON DIOXIDE
C-14
116 Chemical sciences

Access to Document

10.1364/OL.44.001142

AM_OFC_PAS_14CH4Accepted author manuscript, 372 KB

https://arxiv.org/abs/1901.03154

Cite this

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

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.",

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author = "Juho Karhu and Teemu Tomberg and {Senna Vieira}, Francisco and Guillaume Genoud and Vesa H{\"a}nninen and Markku Vainio and Markus Mets{\"a}l{\"a} and Tuomas Hieta and Steven Bell and Lauri Halonen",

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AU - Karhu, Juho

AU - Tomberg, Teemu

AU - Senna Vieira, Francisco

AU - Genoud, Guillaume

AU - Hänninen, Vesa

AU - Vainio, Markku

AU - Metsälä, Markus

AU - Hieta, Tuomas

AU - Bell, Steven

AU - Halonen, Lauri

PY - 2019/3/1

Y1 - 2019/3/1

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AB - 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.

KW - RADIOCARBON DIOXIDE

KW - C-14

KW - 116 Chemical sciences

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