Density and concentration fluctuations in SiO2-GeO2 optical fiber glass investigated by small angle x-ray scattering - Archive ouverte HAL Access content directly
Journal Articles Journal of Applied Physics Year : 2008

Density and concentration fluctuations in SiO2-GeO2 optical fiber glass investigated by small angle x-ray scattering

Abstract

Density and concentration fluctuations have been investigated in a 3 mol % GeO2 doped silica glass as a function of the fictive temperature (the temperature at which the structure of the supercooled liquid has been frozen-in to form the glass) by small angle x-ray scattering measurements. The fluctuations increase in a way is quite similar to that observed for pure silica glass as a result of density fluctuation fictive temperature dependence. Fluctuations have also been studied in glasses containing different amounts of GeO2 up to 21 mol % GeO2. The fluctuations are shown to increase very strongly with germanium amount as a result of strong concentration fluctuation increase. This observation is in agreement with already observed excess losses in light scattering measurements.

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Polymers
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Dates and versions

hal-00385046 , version 1 (18-05-2009)

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Rozenn Le Parc, Bernard Champagnon, Claire Levelut, Valérie Martinez, Laurent David, et al.. Density and concentration fluctuations in SiO2-GeO2 optical fiber glass investigated by small angle x-ray scattering. Journal of Applied Physics, 2008, 103 (9), pp.094917. ⟨10.1063/1.2917384⟩. ⟨hal-00385046⟩
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