Optical studies of Eu3+ doped oxyfluoroborate glass

Rare earth doped oxyfluoroborate glasses have been prepared with different concentration of Eu3+. The UV-Vis/NIR optical absorption, laser induced fluorescence and photoacoustic spectra of Eu3+ 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 D-5(0) level at various concentrations of Eu3+ have been used to explain the concentration dependent fluorescence quenching. The mechanisin of quenching was found to he dipole-dipole. Energy transfer have also been Studied frorn Eu3+ to Pr3+ in sample with 1 mol% Eu3+ + 1 mol% Pr3+. (C) 2003 Published by Elsevier B.V.