Optical transitions probabilities of Dy 3+ ions in fluoroindate glass

Abstract

Fluoroindate glasses of the following compositions: (40− x)InF 3–20ZnF 2–20SrF 2–2GdF 3 –2NaF–16BaF 2– xDyF 3 with x=1.0, 2.0, 3.0 and 4.0 mol% were prepared in air atmosphere using ammonium process. Absorptions spectra of these glasses at room temperature in the spectral range 300–2500 nm were obtained. Each spectra obtained show identical characteristics and only a change in the intensity of the different bands as the concentration of Dy 3+ is changed. The oscillator strength is obtained from the area under the absorption band. Using the Judd–Ofelt theory, intensity parameters Ω λ ( λ=2, 4, 6) for f–f transitions of Dy 3+ ions as well as transition probabilities, branching ratios, and radiative lifetimes of each band were determined. The optical properties of the fluoroindate glasses doped with Dy 3+ are compared with those of other glasses described in the literature.