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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Viegas, D.
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Publications (8/8 displayed)
- 2016Characterization of zinc oxide coated optical fiber long period gratings with improved refractive index sensing propertiescitations
- 2016Zinc oxide coated optical fiber long period gratings for sensing of volatile organic compoundscitations
- 2016Zinc oxide coated optical fiber long period gratings for sensing of volatile organic compounds
- 2016Fabrication and Characterization of Metal Oxide-Coated Long-Period Fiber Gratingscitations
- 2015Sensing Structure Based on Surface Plasmon Resonance in Chemically Etched Single Mode Optical Fibrescitations
- 2014Enhanced refractive index sensing characteristics of optical fibre long period grating coated with titanium dioxide thin filmscitations
- 2013Sensing Structure based on Surface Plasmonic Resonance in Single Mode Optical Fibers Chemically Etchedcitations
- 2012Simultaneous measurement of partial pressure of O-2 and CO2 with a hybrid interferometercitations
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article
Enhanced refractive index sensing characteristics of optical fibre long period grating coated with titanium dioxide thin films
Abstract
A new type of fibre-optic refractive index sensor based on a long period fibre grating (LPFG) coated with a titanium dioxide (TiO2) thin film was demonstrated. The wavelength shift of the attenuation bands of this LPFG sensor to changes in the refractive index of the external media from 1.30 to 1.64 RIU was investigated. In order to optimize the sensor the TiO2 thin film thickness deposited around the LPFGs was varied from 10 to 80 nm. It was found that the TiO2 thin film increases the wavelength sensitivity of the LPFG to changes in the surrounding refractive index for values lower and higher than the cladding refractive index. As opposed to the bare LPFG it was shown the possibility to monitor refractive indices lower and higher than cladding refractive index tailoring the TiO2 thickness. An average wavelength sensitivity of 5250 nm/RIU was achieved in the range 1.444 to 1.456 RIU for a TiO2 thickness of 50 nm. In the region between 1.46 and 1.48 RIU the average sensitivity of about 825 nm/RIU was measured for a 40 nm thick film.