Integrating cavity based gas cells: a multibeam compensation scheme for pathlength variation

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dc.contributor.author Bergin, S.
dc.contributor.author Hodgkinson, Jane
dc.contributor.author Francis, Daniel
dc.contributor.author Tatam, Ralph P.
dc.date.accessioned 2016-08-10T08:57:43Z
dc.date.available 2016-08-10T08:57:43Z
dc.date.issued 2016-05-10
dc.identifier.citation Bergin, S. et al. (2016) Integrating cavity based gas cells: a multibeam compensation scheme for pathlength variation, Optics Express, Vol. 24, Iss. 12, 13647-13664 en_UK
dc.identifier.issn 1094-4087
dc.identifier.uri http://dx.doi.org/10.1364/OE.24.013647
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/10257
dc.description.abstract We present a four beam ratiometric setup for an integrating sphere based gas cell, which can correct for changes in pathlength due to sphere wall contamination. This allows for the gas absorption coefficient to be determined continuously without needing to recalibrate the setup. We demonstrate the technique experimentally, measuring methane gas at 1651nm. For example, contamination covering 1.2% of the sphere wall resulted in an uncompensated error in gas absorption coefficient of ≈41%. With the ratiometric scheme, this error was reduced to ≈2%. Potential limitations of the technique, due to subsequent deviations from mathematical assumptions are discussed, including severe sphere window contamination. en_UK
dc.language.iso en en_UK
dc.publisher OSA en_UK
dc.rights Attribution 4.0 International
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.title Integrating cavity based gas cells: a multibeam compensation scheme for pathlength variation en_UK
dc.type Article en_UK


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