Abstract
The thermal stability and spectroscopic properties of Er2O3‐doped TeO2–GeO2–ZnO–Na2O–Y2O3 glasses for 1.5 μm fiber amplifiers were investigated. The thermal stability of the 75TeO2·20ZnO· 5Na2O glass was improved by introducing GeO2 and Y2O3. The radiative transition and the nonradiative transition have a dominant influence on the 4I13/2 level lifetime of Er3+ in high‐ and low‐GeO2 regions, respectively. Adding Y2O3 increases the 4I13/2 level lifetime of Er3+ significantly. The Judd–Ofelt (J‐O) parameter Ω6 shows a strong correlation with the 1.5 μm emission bandwidth; and the larger the Ω6, the wider the bandwidth.
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