Remote gaseous acid sensing within a porphyrin-doped TiO2 sol-gel layer inside a structured optical fibre

George Huyang; John Canning; Mattias L. Åslund; Masood Naqshbandi; Danial Stocks; Maxwell J. Crossley

doi:10.1117/12.866805

8 September 2010 Remote gaseous acid sensing within a porphyrin-doped TiO₂ sol-gel layer inside a structured optical fibre

George Huyang, John Canning, Mattias L. Åslund, Masood Naqshbandi, Danial Stocks, Maxwell J. Crossley

Author Affiliations +

Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 76531Q (2010) https://doi.org/10.1117/12.866805
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal

Abstract

A porphyrin containing sol-gel layer has been deposited within the interior of the channels of a silica structured optical fibre. Gaseous HCl detection based on protonation of the porphyrin and observed as a change in the spectrum is demonstrated. This system is compared to previous work based on an acid sensor within a liquid-core fibre. The signal-to- noise of this type of fibre system shows a higher level of sensitivity than the liquid-core and has a forty-fold acid diffusion rate increase due to the different medium for acidification.

Citation Download Citation

George Huyang, John Canning, Mattias L. Åslund, Masood Naqshbandi, Danial Stocks, and Maxwell J. Crossley "Remote gaseous acid sensing within a porphyrin-doped TiO₂ sol-gel layer inside a structured optical fibre", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76531Q (8 September 2010); https://doi.org/10.1117/12.866805

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