Optical fibre long period grating based selective vapour sensing of volatile organic compounds

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dc.contributor.author Topliss, Stephen M. -
dc.contributor.author James, Stephen W. -
dc.contributor.author Davis, Frank -
dc.contributor.author Higson, Seamus P. J. -
dc.contributor.author Tatam, Ralph P. -
dc.date.accessioned 2011-10-11T07:08:45Z
dc.date.available 2011-10-11T07:08:45Z
dc.date.issued 2010-01-07T00:00:00Z -
dc.identifier.citation S.M. Topliss, S.W. James, F. Davis, S.P.J. Higson, R.P. Tatam, Optical fibre long period grating based selective vapour sensing of volatile organic compounds, Sensors and Actuators B: Chemical, Volume 143, Issue 2, 7 January 2010, Pages 629-634 -
dc.identifier.issn 0925-4005 -
dc.identifier.uri http://dx.doi.org/10.1016/j.snb.2009.10.008 -
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/4119
dc.description.abstract The chemical sensing capabilities of an optical fibre long period grating (LPG) coated with a functional material are explored. The LPG period and coating thickness are chosen such that the mode transition region, characteristic of LPGs coated with nanostructured coatings, corresponds with the phase matching turning point, ensuring optimum sensitivity. The functional material is a calixarene, which is shown to exhibit sensitivity to the aromatic compounds toluene and benzene, while being relatively insensitive to the aliphatic hydrocarbon hexane. A nanoscale cavity in the calixarene molecule entraps the VOC molecule, thereby altering the refractive index of the coating and influencing the transmission spectrum of the LPG. A sensitivity to toluene of 231 ppmv has been achieved, based on a spectrometer resolution of 0.3 nm. This is a weak molecular interaction thereby ensuring the sensor gives a reversible response when the VOC is removed. The recovery time is of the order of 15 s. en_UK
dc.language.iso en_UK -
dc.publisher Elsevier Science B.V., Amsterdam. en_UK
dc.subject Optical fibre sensor en_UK
dc.subject Long period grating en_UK
dc.subject VOC en_UK
dc.subject Calixarene en_UK
dc.title Optical fibre long period grating based selective vapour sensing of volatile organic compounds en_UK
dc.type Article -


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