Abstract
In this work we report time-resolved line-narrowed fluorescence spectra of the 5D0→7F0–6 transitions of Eu3+-doped 80TeO2–5TiO2–15Nb2O5 glass obtained at 10K by using different resonant excitation wavelengths along the 7F0→5D0 transition. The wavelength dependence of the 7F1 splitting suggests the existence of a broad distribution of Eu3+ centres possessing a variety of local field environments. The influence of the local coordination ions on the optical properties of Eu3+ has been studied by analysing the dependence of the crystal field (CF) parameters on the excitation energy along the 7F0→5D0 transition.
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