Practical sensitive fluorescence sensing with microstructured fibres

E. P. Schartner; R. T. White; S. C, Warren-Smith; T. M. Monro

doi:10.1117/12.835350

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5 October 2009 Practical sensitive fluorescence sensing with microstructured fibres

E. P. Schartner, R. T. White, S. C, Warren-Smith, T. M. Monro

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035X (2009) https://doi.org/10.1117/12.835350
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

We demonstrate a new detection limit for fluorescent species in small-core glass microstructured optical fibres. Two detection schemes are explored: forward detection by an optical spectrum analyser; and backward detection by a photodiode. In the second scheme, characterisation of the fluorescence signal during fibre filling allows us to accurately separate quantum-dot fluorescence from intrinsic glass fluorescence. The spectral overlap of these two fluorescence sources is the principal limit to the detection sensitivity. We demonstrate a detection limit of ~200 pM.

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E. P. Schartner, R. T. White, S. C, Warren-Smith, and T. M. Monro "Practical sensitive fluorescence sensing with microstructured fibres", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035X (5 October 2009); https://doi.org/10.1117/12.835350

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