Multimode fiber tapers for reproducible refractometric liquid detection

Matej Komanec; Tomas Martan; Tomas Nemecek; Stanislav Zvanovec

doi:10.1117/1.OE.54.4.047102

8 April 2015 Multimode fiber tapers for reproducible refractometric liquid detection

Matej Komanec, Tomas Martan, Tomas Nemecek, Stanislav Zvanovec

Author Affiliations +

Funded by: Technological Agency of the Czech Republic

Optical Engineering, Vol. 54, Issue 4, 047102 (April 2015). https://doi.org/10.1117/1.OE.54.4.047102

Abstract

This paper describes the refractometric detection of liquids based on silica multimode optical fibers which were tapered to increase the evanescent-wave overlap for higher sensor sensitivity. By precisely monitoring the production process, consistent sample parameters were achieved. More than 200 tapers with a taper waist diameter range from 6.0 to 76.3 μm were prepared from polymer-clad silica and gradient-index multimode fibers. U-shaped fiber taper sensitivities were analytically compared with straight tapers with resulting intensity sensitivities of over 200%/RIU. Crucial parameters for real sensor applications, such as measurement repeatability, reproducibility, and long-term stability, were further studied for polymer-clad silica straight tapers. Long-term stability was monitored showing stable measurement results over a 6 months long interval. Measurement repeatability and reproducibility with standard deviations of 0.55%/RIU and 2.26%/RIU, respectively, were achieved.

Citation Download Citation

Matej Komanec, Tomas Martan, Tomas Nemecek, and Stanislav Zvanovec "Multimode fiber tapers for reproducible refractometric liquid detection," Optical Engineering 54(4), 047102 (8 April 2015). https://doi.org/10.1117/1.OE.54.4.047102

Published: 8 April 2015

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