Optical fibre cantilever sensor for biological application

J. Li, Y. X. Zhou, G. Patterson, W. M. Shu, R. R. J. Maier, R. Fowler, D. P. Hand, W. N. Macpherson

Research output: Chapter in Book/Report/Conference proceedingChapter


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.
Original languageEnglish
Title of host publication23rd International Conference on Optical Fibre Sensors
Publication statusPublished - 2 Jun 2014
Event23rd International Conference on Optical Fibre Sensors - Santander, Spain
Duration: 2 Jun 20146 Jun 2014

Publication series

NameProceedings of SPIE


Conference23rd International Conference on Optical Fibre Sensors


  • laser fabrication
  • micro-machining
  • optical fibre cantilever
  • pathogen detection

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