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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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Webb, D. J.
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Topics
Publications (19/19 displayed)
- 2018Novel thermal annealing methodology for permanent tuning polymer optical fiber Bragg gratings to longer wavelengthscitations
- 2017Thermal and chemical treatment of polymer optical fiber Bragg grating sensors for enhanced mechanical sensitivitycitations
- 2017Polymer optical fiber Bragg grating inscription with a single UV laser pulsecitations
- 2017Polymer optical fiber Bragg grating inscription with a single UV laser pulse
- 2017Polymer optical fiber sensors in human life safety
- 2017Annealing and etching effects on strain and stress sensitivity of polymer optical fibre Bragg grating sensors
- 2017Time-dependent variation of POF Bragg grating reflectivity and wavelength submerged in different liquids
- 2017Portable polymer optical fibre cleaver
- 2016Passive and Portable Polymer Optical Fiber Cleavercitations
- 2016Fuel level sensor based on polymer optical fiber Bragg gratings for aircraft applicationscitations
- 2015Time-dependent variation of fiber Bragg grating reflectivity in PMMA-based polymer optical fiberscitations
- 2015Fiber-optic liquid level monitoring system using microstructured polymer fiber Bragg grating array sensors: performance analysiscitations
- 2014Increase of the photosensitivity of undoped poly(methylmethacrylate) under UV radiation at 325 nmcitations
- 2014Investigations on birefringence effects in polymer optical fiber Bragg gratingscitations
- 2014Photosensitivity mechanism of undoped poly(methyl methacrylate) under UV radiation at 325 nm and its spatial resolution limitcitations
- 2013Highly photosensitive polymethyl methacrylate microstructured polymer optical fiber with doped corecitations
- 2013Connectorization of fibre Bragg grating sensors recorded in microstructured polymer optical fibrecitations
- 2011Photonic crystal fiber Bragg grating based sensors-opportunities for applications in healthcare
- 2011Optical fibre Bragg grating recorded in TOPAS cyclic olefin copolymercitations
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document
Investigations on birefringence effects in polymer optical fiber Bragg gratings
Abstract
Step-index polymer optical fiber Bragg gratings (POFBGs) and microstructured polymer optical fiber Bragg gratings (mPOFBGs) present several attractive features, especially for sensing purposes. In comparison to FBGs written in silica fibers, they are more sensitive to temperature and pressure because of the larger thermo-optic coefficient and smaller Young's modulus of polymer materials. (M)POFBGs are most often photowritten in poly(methylmethacrylate) (PMMA) materials using a continuous-wave 325 nm HeCd laser. For the first time to the best of our knowledge, we study photoinduced birefringence effects in (m)POFBGs. To achieve this, highly reflective gratings were inscribed with the phase mask technique. They were then monitored in transmission with polarized light. For this, (m)POF sections a few cm in length containing the gratings were glued to angled silica fibers. Polarization dependent loss (PDL) and differential group delay (DGD) were computed from the Jones matrix eigenanalysis using an optical vector analyser. Maximum values exceeding several dB and a few picoseconds were obtained for the PDL and DGD, respectively. The response to lateral force was finally investigated. As it induces birefringence in addition to the photo-induced one, an increase of the PDL and DGD values were noticed.