Suspended-core optical fibres for organic dye absorption spectroscopy

Barbara Wajnchold; Ada Umińska; Michał Grabka; Dariusz Kotas; Szymon Pustelny; Wojciech Gawlik

doi:10.1117/12.2026019

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20 May 2013 Suspended-core optical fibres for organic dye absorption spectroscopy

Barbara Wajnchold, Ada Umińska, Michał Grabka, Dariusz Kotas, Szymon Pustelny, Wojciech Gawlik

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Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87941B (2013) https://doi.org/10.1117/12.2026019
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

In this paper, we report on our study of UV-VIS absorption spectroscopy in suspended-core optical fibres (SCFs) filled with organic-dye solutions. We compare two different dye classes, the anionic dye - bromophenol blue sodium salt (BB) and cationic dye - oxazine 725 perchlorate (OX). While the results obtained with BB are in a good agreement with the spectra measured in a standard reference cuvette, those obtained with OX are different and reveal much stronger absorption of light than in cuvettes. This stronger absorption indicates accumulation of the dye molecules on the short section of the core close to the end of the fibre. This observation demonstrates difference in physicochemical properties of the two dye classes and is important for the development of chemical sensors based on SCFs.

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Barbara Wajnchold, Ada Umińska, Michał Grabka, Dariusz Kotas, Szymon Pustelny, and Wojciech Gawlik "Suspended-core optical fibres for organic dye absorption spectroscopy", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941B (20 May 2013); https://doi.org/10.1117/12.2026019

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