Absorption measurement of methane gas with a broadband light source and interferometric signal processing

Wei Jin; G. Stewart; B. Culshaw; S. Murray; D. Pinchbeck

doi:10.1364/OL.18.001364

Absorption measurement of methane gas with a broadband light source and interferometric signal processing

Wei Jin, G. Stewart, B. Culshaw, S. Murray, D. Pinchbeck

Research output: Journal article publication › Journal article › Academic research › peer-review

73 Citations (Scopus)

Abstract

The relationship between methane concentration and second-harmonic output of a particular optical methane-detection system is derived. The system uses a broadband source and a comb filter with its transmission peaks matched to the R-branch absorption lines of methane. An optimal modulation index is obtained, and a noise-limited detection resolution of 0.02% lower explosive level (3-s time constant) is estimated.

Original language	English
Pages (from-to)	1364-1366
Number of pages	3
Journal	Optics Letters
Volume	18
Issue number	16
DOIs	https://doi.org/10.1364/OL.18.001364
Publication status	Published - 1 Jan 1993
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.18.001364

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abstract = "The relationship between methane concentration and second-harmonic output of a particular optical methane-detection system is derived. The system uses a broadband source and a comb filter with its transmission peaks matched to the R-branch absorption lines of methane. An optimal modulation index is obtained, and a noise-limited detection resolution of 0.02% lower explosive level (3-s time constant) is estimated.",

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AU - Murray, S.

AU - Pinchbeck, D.

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AB - The relationship between methane concentration and second-harmonic output of a particular optical methane-detection system is derived. The system uses a broadband source and a comb filter with its transmission peaks matched to the R-branch absorption lines of methane. An optimal modulation index is obtained, and a noise-limited detection resolution of 0.02% lower explosive level (3-s time constant) is estimated.

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Absorption measurement of methane gas with a broadband light source and interferometric signal processing

Abstract

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