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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Novais, Susana
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Publications (7/7 displayed)
- 2023NonInvasive Glucose Fiber Sensor Based on Self-Imaging Technique: Proof of Concept
- 2023Transmissive glucose concentration plasmonic Au sensor based on unclad optical fibercitations
- 2020New Material Conceptscitations
- 2020Embedded fiber sensors to monitor temperature and strain of polymeric parts fabricated by additive manufacturing and reinforced with NiTi wirescitations
- 2018Optical Fiber Tip Sensor for the Measurement of Glucose Aqueous Solutionscitations
- 2018Glucose measurements with optical fiber sensor based on coreless silica fiber
- 2018Determination of thermo-optic coefficient of ethanol-water mixtures with optical fiber tip sensorcitations
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document
Determination of thermo-optic coefficient of ethanol-water mixtures with optical fiber tip sensor
Abstract
In this work, the thermo-optic coefficient (TOC) of ethanol-water mixtures, through refractive index and temperature measurements are determined using an etched optical fiber tip based on a multimode interferometer. The proposed probe is fabricated by fusion-splicing a 5.2 mm long coreless fiber section to a single mode fiber. To reduce the sensor dimensions and improve its sensitivity towards external medium variations, the fiber tip is subjected to wet chemical etching using a solution of 40% hydrofluoric acid, presenting a final diameter of 24.4 mu m. The TOC of each solution is estimated and, in the case of deionized water and pure ethanol, its value is of -1.128 x 10(-4) degrees C-1 and -3.117 x 10(-4) degrees C-1, respectively.