Glass ceramics for optical amplifiers: rheological, thermal, and optical properties
| Autor: | S. Mosso, Marcello Baricco, J. Kraus, Marco Braglia, G. Dai, C Bruschi, Livio Battezzati, F Rossi |
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| Rok vydání: | 1999 |
| Předmět: |
Glass-ceramic
Photoluminescence Materials science Glass fiber Analytical chemistry Mineralogy Condensed Matter Physics Isothermal process Electronic Optical and Magnetic Materials Amorphous solid law.invention Annealing (glass) law visual_art Phase (matter) Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic |
| Zdroj: | Journal of Non-Crystalline Solids. :170-175 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/s0022-3093(99)00457-3 |
| Popis: | A glass ceramic system based on a glass of nominal composition (mol%) 32.4SiO 2 –8.1Al 2 O 3 –31.4CdF 2 –5.4ZnF 2 –4.3YF 3 –18.4PbF 2 (TGC) doped with 500 ppmw of PrF 3 has been prepared and studied to explore the possibility of using it for optical fibre amplifiers operating at 1.3 μm. A comparative analysis of two samples having the same nominal composition, but obtained in different conditions, showed that one sample was completely amorphous, while the other one contained crystals of the phase Pb x Cd 1− x F 2 . Crystals of the same phase were found in the amorphous sample after isochronal and isothermal treatments, obtaining a glass ceramic system transparent in the visible range. The coarsening of the crystals investigated by DSC, TEM, XRD decreased on annealing while the photoluminescence intensity increased, indicating a change in the surrounding of Pr 3+ ions during the controlled ceramming process. Finally, based on the study of the rheological properties of the glass ceramic system we suggest that the temperature interval suitable for fibre drawing is between 572°C and 614°C. |
| Databáze: | OpenAIRE |
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