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Proceedings Paper

Sensitivity improvements of exposed-core microstructured optical fibre Bragg grating refractive index sensors
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Paper Abstract

Femtosecond 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 μm to 12.5 μm 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 (isopropanol).

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577S (2 June 2014); doi: 10.1117/12.2059161
Show Author Affiliations
S. C. Warren-Smith, The Univ. of Adelaide (Australia)
T. M. Monro, The Univ. of Adelaide (Australia)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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