Characterization of emission properties of Er3+ ions in TeO2–CdF2–WO3 glasses

TeO2–CdF2–WO3 glasses with various compositions and Er3+ concentrations were prepared by conventional melting method. Their optical properties were studied by measuring the absorption, luminescence spectra and the decay patterns at room temperature. From the optical absorption spectra the Judd-Ofelt parameters (Ωt), transition probabilities, branching ratios of various transitions, and radiative lifetimes were calculated. The absorption and emission cross-section spectra of the 4I15/2 to 4I13/2 transition of erbium were determined. Emission quantum efficiencies and the average critical distance R0 which provides a measure for the strength of cross relaxation were determined.

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► Er3+ doped glasses were synthesized by conventional melt quenching technique.
► Judd-Ofelt parameters and some radiative properties were calculated.
► Stimulated emission cross sections of the samples were calculated.
► Luminescence lifetime of the 4S3/2 level of the Er3+ ions were measured.
► Cross relaxation rates and the critical interaction parameters were determined.