2 June 2014 Optical fibre cantilever sensor for biological application
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91575I (2014); doi: 10.1117/12.2059869
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
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.
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J. Li, Y. X. Zhou, G. Patterson, W. M. Shu, R. R. J. Maier, R. Fowler, D. P. Hand, W. N. MacPherson, "Optical fibre cantilever sensor for biological application", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575I (2 June 2014); doi: 10.1117/12.2059869; http://dx.doi.org/10.1117/12.2059869
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KEYWORDS
Sensors

Pathogens

Optical fibers

Polymers

Biosensors

Free space optics

Biosensing

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