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Experimental sensing of CO2 and CH4 gases using the CoSM correlation spectroscopy method and comparison with simulated predictions from the HITRAN database

Experimental sensing of CO2 and CH4 gases using the CoSM correlation spectroscopy method and comparison with simulated predictions from the HITRAN database
Experimental sensing of CO2 and CH4 gases using the CoSM correlation spectroscopy method and comparison with simulated predictions from the HITRAN database
This paper describes recent experimental results on the detection of carbon dioxide and methane gases using the complementary source modulation (CoSM) method, the topology of which is shown in figure 1, and compares these with numerical simulations from data derived from the HITRAN database. There is a particular interest in sensors using optical fibres coupled to a passively coupled sensing head. CO have reasonably strong absorption bands in the 2.0 µm and 2.3 µm spectral regions respectively. That of methane in the 2.3 µm band is less suited for propagation over fibre lengths greater than a few metres, so the somewhat weaker absorption band at 1.6 µm is more suited to sensing over extended fibre networks. Analyses have been conducted for both of these gases and results will be presented for the prediction of modulation index, signal/noise ratio and detection sensitivity for these gases. Experimental results for these gases, using the CoSM method will be presented for the first time, and comparisons with simulations made.
Austin, Ed A.D.
49244605-390e-4a67-a184-58434ba30e7c
Chambers, Paul
1a8fdd11-d8bd-4677-b69b-62c8d22141d2
Dakin, John P.
04891b9b-5fb5-4245-879e-9e7361adf904
Austin, Ed A.D.
49244605-390e-4a67-a184-58434ba30e7c
Chambers, Paul
1a8fdd11-d8bd-4677-b69b-62c8d22141d2
Dakin, John P.
04891b9b-5fb5-4245-879e-9e7361adf904

Austin, Ed A.D., Chambers, Paul and Dakin, John P. (2004) Experimental sensing of CO2 and CH4 gases using the CoSM correlation spectroscopy method and comparison with simulated predictions from the HITRAN database. Seventh European Conference on Optical Chemical Sensors and Biosensors (Europt(R)ode VII), Madrid, Spain. 03 - 06 Apr 2004. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper describes recent experimental results on the detection of carbon dioxide and methane gases using the complementary source modulation (CoSM) method, the topology of which is shown in figure 1, and compares these with numerical simulations from data derived from the HITRAN database. There is a particular interest in sensors using optical fibres coupled to a passively coupled sensing head. CO have reasonably strong absorption bands in the 2.0 µm and 2.3 µm spectral regions respectively. That of methane in the 2.3 µm band is less suited for propagation over fibre lengths greater than a few metres, so the somewhat weaker absorption band at 1.6 µm is more suited to sensing over extended fibre networks. Analyses have been conducted for both of these gases and results will be presented for the prediction of modulation index, signal/noise ratio and detection sensitivity for these gases. Experimental results for these gases, using the CoSM method will be presented for the first time, and comparisons with simulations made.

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e-pub ahead of print date: 2004
Venue - Dates: Seventh European Conference on Optical Chemical Sensors and Biosensors (Europt(R)ode VII), Madrid, Spain, 2004-04-03 - 2004-04-06

Identifiers

Local EPrints ID: 41773
URI: http://eprints.soton.ac.uk/id/eprint/41773
PURE UUID: 1298cd26-94dd-4427-8863-1c5ac1472b38

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Date deposited: 20 Oct 2006
Last modified: 22 Sep 2021 16:30

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Contributors

Author: Ed A.D. Austin
Author: Paul Chambers
Author: John P. Dakin

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