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Proceedings Paper

A high sensitivity refractometer based on a tapered SCSMF structure and its application to biosensing
Author(s): Qiang Wu; Youqiao Ma; Yuliya Semenova; Jinhui Yuan; Lin Bo; Pengfei Wang; Xinzhu Sang; Mianzhen Teng; Chongxiu Yu; Christy Charlton O'Mahony; Gerald Farrell
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Paper Abstract

A high sensitivity refractive index (RI) sensor based on a tapered small core singlemode fibre (SCSMF) structure is proposed and developed. By tapering the SCSMF section, this sensor has very high sensitivity around the RI of water. Experimentally we have demonstrated a sensitivity of 1988.5 nm/RIU (RI unit) in the RI range from 1.3325 to 1.3407 by tapering a SCSMF section from a diameter of 125 μm to a diameter of 16 μm. The feasibility of using this type of sensor for biosensing application has also been verified by experiments. This was undertaken using a suitable Fibrinogen antigen surface functionalisation, which successfully showed that the sensor can in principle detect differences in the concentration of a Fibrinogen antibody.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91574U (2 June 2014); doi: 10.1117/12.2059270
Show Author Affiliations
Qiang Wu, Dublin Institute of Technology (Ireland)
Youqiao Ma, Dublin Institute of Technology (Ireland)
Yuliya Semenova, Dublin Institute of Technology (Ireland)
Jinhui Yuan, Beijing Univ. of Posts and Telecommunications (China)
Lin Bo, Dublin Institute of Technology (Ireland)
Pengfei Wang, Dublin Institute of Technology (Ireland)
Xinzhu Sang, Beijing Univ. of Posts and Telecommunications (China)
Mianzhen Teng, Beijing Univ. of Posts and Telecommunications (China)
Chongxiu Yu, Beijing Univ. of Posts and Telecommunications (China)
Christy Charlton O'Mahony, Dublin City Univ. (Ireland)
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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