| People | Locations | Statistics |
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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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Lemiere, Arnaud
Tampere University
in Cooperation with on an Cooperation-Score of 37%
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Publications (7/7 displayed)
- 2024Characterization of biodegradable core–clad borosilicate glass fibers with round and rectangular cross-sectioncitations
- 2023Characterization of biodegradable core–clad borosilicate glass fibers with round and rectangular cross‐sectioncitations
- 2023Spectroscopic properties of Er<sup>3+</sup> doped germanate glasses before and after a heat treatment processcitations
- 2023Spectroscopic properties of Er3+ doped germanate glasses before and after a heat treatment processcitations
- 2022Study of visible, NIR, and MIR spectroscopic properties of Er3+-doped tellurite glasses and glass–ceramicscitations
- 20192-μm Brillouin laser based on infrared nonlinear glass fiberscitations
- 2019Mid-infrared supercontinuum generation from 2 to 14 μm in arsenic-and antimony-free chalcogenide glass fiberscitations
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article
Spectroscopic properties of Er<sup>3+</sup> doped germanate glasses before and after a heat treatment process
Abstract
<jats:p>In this paper structural, thermal and optical properties of Er<jats:sup>3+</jats:sup> doped germanate glasses with the composition of 63.0GeO<jats:sub>2</jats:sub>-9.8Ga<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>-11.1BaO-4.9X-8.8Na<jats:sub>2</jats:sub>O-2.5Er<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> (in mol%), where X = ZnO, TiO<jats:sub>2</jats:sub>, Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and Y<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> are reported. The investigated glasses exhibit low phonon energies (<1000 cm<jats:sup>-1</jats:sup>) and high glass transition temperature varying between 588 and 642 °C. The Raman spectra evidence about different polymerization degree of the glasses. The thermal treatment leads to the precipitation of various crystals, the composition of which depends on the glass composition. According to the spectroscopic properties Er<jats:sup>3+</jats:sup> ions are suspected to have similar local environment in the as-prepared glasses. However, Er-doped crystals are expected to precipitate upon devitrification, which leads to significant change of the spectroscopic properties, in particular increase in the intensity of upconversion and MIR emissions is observed. It is demonstrated that the glasses with Y<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, ZnO and TiO<jats:sub>2</jats:sub> are promising glasses especially for MIR applications.</jats:p>