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Proceedings 2017, 1(4), 333; doi:10.3390/proceedings1040333

Etched and Nanocoated SMS Fiber Sensor for Detection of Salinity Concentration

1
School of Physics, Universidad Nacional de Colombia—Medellín Campus, Medellin, Colombia
2
Department of Electrical and Electronical Engineering, Universidad Pública de Navarra, Navarra, Spain
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 25 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
Download PDF [857 KB, uploaded 5 September 2017]

Abstract

An optical fibre refractometer has been developed by etching and deposition of a thin film of indium tin oxide (ITO) on a single-mode-multimode-single-mode (SMS) fibre structure. The interference between modes in this structure is sensitive to the refractive index changes of the surrounding medium, achieving sensitivities of up to 7000 nm/RIU in the 1.333–1.338 RIU range. A salinity sensor has been implemented as a practical application of this proposed structure. Fast Fourier transform (FFT) analysis and tracking of an interference dip were used to monitor the interference between modes obtaining sensitivities of 0.99 nm/PSU and 0.025 rad/PSU, respectively.
Keywords: etching; optic fibre sensor; refractive index; single-mode–multimode–single-mode (SMS); thin-films; salinity etching; optic fibre sensor; refractive index; single-mode–multimode–single-mode (SMS); thin-films; salinity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cardona-Maya, Y.; Villar, I.D.; Socorro, A.B.; Corres, J.M.; Arregui, F.J.; Botero-Cadavid, J.F. Etched and Nanocoated SMS Fiber Sensor for Detection of Salinity Concentration. Proceedings 2017, 1, 333.

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