Ceramics-Silikáty 45, (3) 105 - 110 (2001) |
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SULPHIDE GLASSES DOPED WITH RARE EARTH ELEMENTS
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Ležal Dimitrij 1, Poulain Marcel 2, Zavadil Jiří 3
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1 Laboratory of Inorganic Materials IIC AS CR Prague,
250 68 Řež u Prahy, Czech Republic
2 Laboratoire des Matérieux Photoniques,
Université de Rennes,
Campus de Beaulieu, F-35042 Rennes, France
3 Institute of Radio Engineering and Electronics,
Czech Academy of Sciences,
Chaberská 57, 182 51 Prague 8 - Kobylisy, Czech Republic
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Keywords: Sulphide glasses, Optical fibers, Fluorescence, Luminescence
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Sulphide glasses of GeGaS and GeGaAsS systems doped with rare earth ions are promising materials for various photonic
applications. Because the solubility of rare earth elements is influenced by the purity of host glass, namely by OH group
concentration, the attention has been paid to the preparation of highly pure and homogeneous undoped and rare earth doped
glasses. Particularly the systems Ge0.25Ga0.1-xS0.65Prx and Ge0.25Ga0.05-xAs0.05S0.65Prx with x = 0.05, 0.1, 0.3 and 0.6 wt.% have
been prepared. Synthesised material systems have been characterised by chemical and X-ray analysis, scanning electron
microscopy, light scattering, Raman and low-temperature photoluminescence spectroscopies. The optimal Pr concentration
has been found to be around 0.1 wt.%. For higher Pr and OH group concentrations the constitution of clusters has been
observed. |
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