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Abstract
Fiber-optic Fabry-Pérot interferometers (FPI) can be applied as optical sensors, and excellent measurement sensitivity can be obtained by fine-tuning the interferometer design. In this work, we evaluate the ability of selected dielectric thin films to optimize the reflectivity of the Fabry-Pérot cavity. The spectral reflectance and transmittance of dielectric films made of titanium dioxide (TiO2) and aluminum oxide (Al2O3) with thicknesses from 30 to 220 nm have been evaluated numerically and compared. TiO2 films were found to be the most promising candidates for the tuning of FPI reflectivity. In order to verify and illustrate the results of modelling, TiO2 films with the thickness of 80 nm have been deposited on the tip of a single-mode optical fiber by atomic layer deposition (ALD). The thickness, the structure, and the chemical properties of the films have been determined. The ability of the selected TiO2 films to modify the reflectivity of the Fabry-Pérot cavity, to provide protection of the fibers from aggressive environments, and to create multi-cavity interferometric sensors in FPI has then been studied. The presented sensor exhibits an ability to measure refractive index in the range close to that of silica glass fiber, where sensors without reflective films do not work, as was demonstrated by the measurement of the refractive index of benzene. This opens up the prospects of applying the investigated sensor in biosensing, which we confirmed by measuring the refractive index of hemoglobin and glucose.
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Authors (6)
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Matthieu Weber
- Institut Européen des Membranes Université de Montpellier
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M. Bechelany
- Institut Européen des Membranes Université de Montpellier
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/s17020261
- License
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Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
SENSORS
no. 17,
edition 2,
ISSN: 1424-8220 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Hirsch M., Majchrowicz D., Wierzba P., Weber M., Bechelany M., Szczerska M.: Low-Coherence Interferometric Fiber-Optic Sensors with Potential Applications as Biosensors// SENSORS. -Vol. 17, iss. 2 (2017), s.261-
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/s17020261
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
Referenced datasets
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 0 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 40 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 30 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 200 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 80 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 170 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 20 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 140 um (serie 1)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 130 um (serie 2)
- dataset Distance measurement with the low coherent interferometer with silver mirror (the source wavelegth 1310 nm) - 120 um (serie 2)
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