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Proceedings Paper

A photonic crystal fibre tip refractometer based on multimode interference
Author(s): Pengfei Wang; Ming Ding; Lin Bo; Yuliya Semenova; Gilberto Brambilla; Gerald Farrell
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Paper Abstract

A compact singlemode-photonic crystal fibre-singlemode fibre tip (SPST) refractive index sensor is demonstrated in this paper. A CO2 laser cleaving is exploited to provide a clean-cut fibre tip which is then coated by a layer of gold to increase reflection. An average sensitivity of 39.1 nm/RIU and a resolvable index change of 2.56×10-4 are obtained experimentally with a ~3.2 µm diameter SPST. Because of its compactness, ease of fabrication, linear response, high sensitivity, easy connectivity to other fibreized optical components and low cost, this refractometer could find various applications in chemical and biological sensing.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91578F (2 June 2014); doi: 10.1117/12.2059596
Show Author Affiliations
Pengfei Wang, Dublin Institute of Technology (Ireland)
Ming Ding, Univ. of Southampton (United Kingdom)
Lin Bo, Dublin Institute of Technology (Ireland)
Yuliya Semenova, Dublin Institute of Technology (Ireland)
Gilberto Brambilla, Univ. of Southampton (United Kingdom)
Gerald Farrell, Dublin Institute of Technology (Ireland)

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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