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New lithium–barium–lead–bismuth glasses with low OH − concentration have been obtained. The role of the different components in the glass formation has been explored from the thermal, density, and refractive index measurements. The T g , T x , and T x −T g values of these glasses are in the range of 358–400, 453–575, and 87–197 °C, respectively. The densities...
Er 3+ -doped TeO 2 -based oxysulfide glasses have been prepared in argon atmosphere in carbon crucibles. The thermal analysis and spectroscopic properties of Er 3+ have been considered in terms of sulfide influence. As a function of composition, we have principally measured optical absorption, spontaneous emission and lifetime measurements. Judd-Ofelt theory was introduced...
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