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Sensors 2009, 9(1), 490-502; doi:10.3390/s90100490
Article

Multi-Line Fit Model for the Detection of Methane at ν2 + 2ν3 Band using Hollow-Core Photonic Bandgap Fibres

Ana M. Cubillas 1,* email, Jose M. Lazaro 1 email, Olga M. Conde 1 email, Marco N. Petrovich 2 email and Jose M. Lopez-Higuera 1 email
1 Photonics Engineering Group, University of Cantabria, Avda. de los Castros S/N, 39005 Santander, Spain
2 Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK
* Author to whom correspondence should be addressed.
Received: 25 November 2008; in revised form: 30 December 2008 / Accepted: 12 January 2009 / Published: 14 January 2009
(This article belongs to the Section Chemical Sensors)
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Abstract: Hollow-core photonic bandgap fibres (HC-PBFs) have emerged as a novel technology in the field of gas sensing. The long interaction pathlengths achievable with these fibres are especially advantageous for the detection of weakly absorbing gases. In this work, we demonstrate the good performance of a HC-PBF in the detection of the ν2 + 2ν3 band of methane, at 1.3 μm. The Q-branch manifold, at 1331.55 nm, is targeted for concentration monitoring purposes. A computationally optimized multi-line model is used to fit the Q-branch. Using this model, a detection limit of 98 ppmv (parts per million by volume) is estimated.
Keywords: Gas sensing; Fibre optic sensors; Microstructure devices; Absorption spectroscopy; Hollow-Core Photonic Bandgap Fibres

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MDPI and ACS Style

Cubillas, A.M.; Lazaro, J.M.; Conde, O.M.; Petrovich, M.N.; Lopez-Higuera, J.M. Multi-Line Fit Model for the Detection of Methane at ν2 + 2ν3 Band using Hollow-Core Photonic Bandgap Fibres. Sensors 2009, 9, 490-502.

AMA Style

Cubillas A.M., Lazaro J.M., Conde O.M., Petrovich M.N., Lopez-Higuera J.M. Multi-Line Fit Model for the Detection of Methane at ν2 + 2ν3 Band using Hollow-Core Photonic Bandgap Fibres. Sensors. 2009; 9(1):490-502.

Chicago/Turabian Style

Cubillas, Ana M.; Lazaro, Jose M.; Conde, Olga M.; Petrovich, Marco N.; Lopez-Higuera, Jose M. 2009. "Multi-Line Fit Model for the Detection of Methane at ν2 + 2ν3 Band using Hollow-Core Photonic Bandgap Fibres." Sensors 9, no. 1: 490-502.

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