Optical Fibre Sensors This research theme is devoted to the creation and fabrication of chemical sensors based on a range of sensing platforms modified with advanced functional nano-materials for applications in fields ranging from healthcare  and environmental monitoring  to food and beverage quality assessment . Group is working on the development of the optical fibre sensors based on the long period gratings (LPGs) [4-10], fibre Bragg gratings (FBGs) , tapered optical fibres , evanescent wave spectroscopy  and refection optrodes  The principle of operation of the optical fibre sensors based on various platforms is explained in Figure 1.
Figure 1: Optical fibre sensing platforms
. F. U. Hernandez, S. P. Morgan, B. R. Hayes-Gill, D. Harvey, W. Kinnear, A. Norris, D. Evans, J. G. Hardman and S. Korposh “Characterisation and Use of a Fibre Optic Sensor based on PAH/SiO2 Film for Humidity Sensing in Ventilator Care Equipment”, IEEE Transactions on Biomedical Engineering, 2016, in press.
. R. Selyanchyn, S. Korposh, S. Wakamatsu, S.-W. Lee, “Simultaneous monitoring of humidity and chemical changes using quartz crystal microbalance sensors modified with nano-thin films”, Analytical Sciences, 27, 2011, 1-6.
. S. Korposh, R. Selyanchyn, S. W. James, R. P Tatam, and S.-W. Lee “Identification and quality assessment of beverages using a long period grating fibre-optic sensor modified with a mesoporous thin film”, Sensing and Bio-Sensing Research, 2014, 1, 26–33.
. T. Wang, W. Yasukochi, S. Korposh, S. W. James, R. P. Tatam, S.-W. Lee, “A long period grating optical fiber sensor with nano-assembled porphyrin layers for detecting ammonia gas”, Sensors and Actuators B: Chemical, 2016, in press, ISSN 0925-4005, http://dx.doi.org/10.1016/j.snb.2016.01.058.
. J. Hromadka, B. Tokay, S. James, R. Tatam, S. Korposh, Optical fibre long period grating gas sensor modified with metal organic framework thin films, Sensords and Actuators , 2015, 221, 891–899.
. S. Korposh, I. Chianella, A. Guerreiro, S. Caygill, S. A. Piletsky, S. W. James and R. P. Tatam, “Selective vancomycin detection using optical fibre long period gratings functionalised with molecularly imprinted polymer nanoparticles”, Analyst, 2014, 139, 2229-2236, DOI:10.1039/C3AN02126B.
. S. W. James, S. Korposh, S.-W. Lee and R. P Tatam, “A long period grating-based chemical sensor insensitive to the influence of interfering parameters”, Optics Express, 2014, 22(7), 8012-23. doi: 10.1364/OE.22.008012.
. T. Wang, S. Korposh, S. James, R. Tatam, and S.-W. Lee, “Optical fibre long period grating sensor with a polyelectrolyte alternate thin film for gas sensing of amine odors”, Sensors and Actuators B: Chemical, 2013, 185, 117-124.
. S. Korposh, R. Selyanchyn, W. Yasukochi, S.-W. Lee, S. James, R. Tatam, “Optical fibre long period grating with a nanoporous coating formed from silica nanoparticles for ammonia sensing in water”, Materials Chemistry and Physics, 133, 2012, 785–792.
. S. Korposh, S.-W. Lee, S. W. James, R. P. Tatam, “Refractive index sensitivity of fibre optic long period gratings coated with SiO2 nanoparticle mesoporous thin films”, Meas. Sci. Tech., 22, 2011, 075208 (10p).
. F.U. Hernandez, R. Correia, S. Korposh, S.P. Morgan, B. R. Hayes-Gill, S.W. James, D. Evans, A. Norris, Measurements of endotracheal tube cuff contact pressure using fibre Bragg gratings, Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963435 (September 28, 2015); doi:10.1117/12.2195118.
. R. Jarzebinska, S. Korposh, S. James, W. Batty, R. Tatam, S.-W. Lee,”Optical gas sensor fabrication based on porphyrin-anchored electrostatic self-assembly onto tapered optical fibres", Analytical Letters, 45(10), 2012, 1297–1309.
. W. Yasukochi, T. Wang, S. Kodaira, S. Korposh, R. Selyanchyn, S.-W. Lee, “Ammonia gas detection using an optically sensitive hybrid organic-inorganic multilayer nanoporous film”, Advanced Science Letters, 2013, 19(2), 415–419(5).