Warren-Smith, S.Monro, T.LopezHiguera, J.Jones, J.LopezAmo, M.Santos, J.2015-06-222015-06-222014Proceedings of SPIE, 2014 / LopezHiguera, J., Jones, J., LopezAmo, M., Santos, J. (ed./s), vol.9157, pp.91577S-1-91577S-497816284117510277-786X1996-756Xhttp://hdl.handle.net/2440/92430G. Tsiminis andFemtosecond laser written Bragg gratings have been written in various exposed-core microstructured optical fibres (ECMOFs) for the first time. The EC-MOFs have different core diameters ranging from 2.7 micrometers to 12.5 micrometers and offer different degrees of core access depending on application requirements. Writing a Bragg grating on an open core fibre allows for refractive index based sensing, with a view to multiplexed biosensing. Smaller core fibres are shown both experimentally and theoretically to provide a higher sensitivity, with experimental sensitivities demonstrated up to 6.4 nm/RIU over the refractive index range from 1.333 (water) to 1.377 (isopropanolexperiments).en© 2014 SPIEMicrostructured optical fibres; fibre fabrication; Bragg grating sensors; label-free biosensingConference paper003001278910.1117/12.20591610003492993002792-s2.0-8490312940185266Warren-Smith, S. [0000-0002-2612-6344]