Korposh, SergiyLee, Seung-WooJames, Stephen W.Tatam, Ralph P.2012-07-102012-07-102011-12-31Sergiy Korposha, Seung-Woo Leea, Stephen W. James and Ralph P. Tatam. 21st International Conference on Optical Fiber Sensors, Proceedings of SPIE 77539A, May 15-19, 2011978-081948246-4http://dx.doi.org/10.1117/12.884777http://dspace.lib.cranfield.ac.uk/handle/1826/7076A fibre optic long period grating (LPG) with an nano-assembled mesoporous coating of alternate layers of poly (allylamine hydrochloride) (PAH) and SiO2 nanospheres was used for the development of a fibre-optic refractometer. PAH/ SiO2 films of different thickness have been deposited onto an LPG in order to study the effect of the film thickness on sensor performance. The device showed a sensitivity of 1927 nm/RIU over a RI range of 1.3233-1.4906.Fibre-optic sensorLong period gratingNanoporous filmrefractive indexRefractometerConference paper