Fabrication and performance evaluation of reflectorless refractive index fiber optic sensors using etched enhanced backscattering fibers
Aitkulov A. Sypabekova M. Molardi C. Blanc W. Tosi D.
February 2021Elsevier B.V.
Measurement: Journal of the International Measurement Confederation
2021#172
We propose and evaluate a technique for the fabrication and interrogation of fiber-optic refractive index (RI) sensors based on etched MgO-based nanoparticle doped fibers. The discussed method does not require to inscribe a reflective element into the fiber. Instead, light backscattered by the fiber can give sufficient information that is necessary for detection, by performing the cross-correlation of Rayleigh scatter signatures in the etched zones. The performance of the sensor is monitored using distributed sensing, which allows to interrogate several points along the length of the fiber. The sensitivities of several etched fibers are compared. The largest sensitivity that has been achieved is 45.95 nm/RIU (RI units), with the possibility of implementing temperature compensation.
Distributed sensing , Nanoparticle-doped fiber , Optical backscatter reflectometry , Optical fiber sensor , Refractive index sensor
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Nazarbayev University, School of Engineering and Digital Sciences, 53 Kabanbay Batyr, Nur-Sultan, 010000, Kazakhstan
Université Côte dAzur, CNRS, INPHYNI, UMR 7010, Parc Valrose, Nice, 06108, France
National Laboratory Astana, Laboratory of Biosensors and Bioinstruments, 53 Kabanbay Batyr, Nur-Sultan, 010000, Kazakhstan
Nazarbayev University
Université Côte dAzur
National Laboratory Astana
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