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Proceedings Paper

Optical fibre cantilever sensor for biological application
Author(s): J. Li; Y. X. Zhou; G. Patterson; W. M. Shu; R. R. J. Maier; R. Fowler; D. P. Hand; W. N. MacPherson
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Paper Abstract

Micro-cantilever sensors have shown great promise in a wide range of application are as including chemical and biological sensing. However, many of these devices are based upon a sensor ‘chip’ that requires careful alignment between the cantilever and the read-out system, which can be challenging. Furthermore, optical interrogation typically involves a bulky free-space system. Optical fibre addressed cantilevers have been reported previously in the literature and in this paper we propose techniques to design and fabricate polymer micro-cantilevers for attachment onto the end of standard single mode fibres using laser machining. Low-cost optical sources and a fibre coupled spectrometer are employed to monitor the cantilever deflection and therefore observe biological binding between a species of interest and an activated cantilever. Proof-of-concept experiments show that the sensor is capable of detecting pathogen concentration with down to a level of 105cfu/ml.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575I (2 June 2014); doi: 10.1117/12.2059869
Show Author Affiliations
J. Li, Heriot-Watt Univ. (United Kingdom)
Y. X. Zhou, Heriot-Watt Univ. (United Kingdom)
G. Patterson, Heriot-Watt Univ. (United Kingdom)
W. M. Shu, Heriot-Watt Univ. (United Kingdom)
R. R. J. Maier, Heriot-Watt Univ. (United Kingdom)
R. Fowler, Heriot-Watt Univ. (United Kingdom)
D. P. Hand, Heriot-Watt Univ. (United Kingdom)
W. N. MacPherson, Heriot-Watt Univ. (United Kingdom)

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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