Abstract

Rare earth ion doped oxyfluoroborate glasses have been prepared with different concentration of Sm 3+. The UV-Vis-NIR optical absorption, laser induced fluorescence and photoacoustic spectra of Sm 3+ in this lattice have been studied. Optical parameters such as oscillator strength, stimulated emission cross-section, transition probability, radiative lifetime etc. have been calculated. Lifetime of the 4 G 5/2 level at various concentrations of Sm 3+ have been used to explain the concentration dependent fluorescence quenching. The mechanism of quenching was found to involve quadrupole–quadrupole coupling.

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