Abstract

Rare earth doped oxyfluoroborate glasses have been prepared with different concentration of Eu 3+. The UV-Vis/NIR optical absorption, laser induced fluorescence and photoacoustic spectra of Eu 3+ in this host have been studied. Different optical parameters such as oscillator strength, Judd–Ofelt intensity parameter, stimulated emission cross-section, transition probability, branching ratio and radiative lifetime, etc. have been calculated. Lifetime of the 5 D 0 level at various concentrations of Eu 3+ have been used to explain the concentration dependent fluorescence quenching. The mechanism of quenching was found to be dipole–dipole. Energy transfer have also been studied from Eu 3+ to Pr 3+ in sample with 1 mol% Eu 3+ + 1 mol% Pr 3+.

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