Judd–Ofelt analysis and near infrared emission properties of the Er3+ ions in tellurite glasses containing WO3 and CdO

The influence of erbium (Er3+) ion concentration on the infrared emission at 1.5 μm in TeO2–WO3 and TeO2–CdO–WO3 glasses was studied. The samples were prepared by conventional melt quenching method. The optical properties were studied by measuring the absorption and luminescence spectra at room temperature. The Judd–Ofelt parameters (Ωt), transition probabilities, branching ratios of various transitions and their radiative lifetimes were calculated from the optical absorption spectra. Absorption and emission cross-section spectra and the Stark Levels splitting for the 4I13/2 to 4I15/2 transition of Er3+ centered at 1.5 μm were determined.

Research Highlights
► The influence of erbium (Er3+) ion concentration on the infrared emission at 1.5 μm in TeO2–WO3 and TeO2–CdO–WO3 glasses was studied.
► The Judd–Ofelt parameters (Ωt), transition probabilities, branching ratios of various transitions and their radiative lifetimes were calculated from the optical absorption spectra.
► Absorption and emission cross-section spectra and the Stark Levels splitting for the 4I13/2 to 4I15/2 transition of Er3+ centered at 1.5 μm were determined.