Effect of relative alkali content on absorption linewidth in erbium-doped tellurite glasses

Er 3+ doped tellurite glasses with various Na 2 O/Li 2 O, Na 2 O/K 2 O and K 2 O/Li 2 O ratios (0-4.5) were prepared at 850°C using a platinum crucible. The effect of relative alkali content on absorption linewidth in erbium-doped tellurite glasses was investigated. The highest effective linewidth was obtained from glass samples with mixed alkali molar ratio of Na 2 O/Li 2 O=1, Na 2 O/K 2 O=1 and K 2 O/Li 2 O=1. Glass transition temperature, crystallization temperature, density, refractive index, Judd-Ofelt parameters and emission cross-section of Er 3+ doped tellurite glasses are also reported.

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