Optical absorption and fluorescence spectral studies of Ho3+ ions in PbO–Al2O3–B2O3 glass system

Abstract

Several physical properties and optical absorption and photoluminescence spectra of Ho3+ doped PbO–Al2O3–B2O3 glasses have been studied. From the measured intensities of various absorption bands of these glasses the Judd–Ofelt parameters Ω2, Ω4 and Ω6 have been evaluated. The Judel–Oflet theory could successfully be applied to characterise the absorption and luminescence spectra of these glasses. From this theory various radiative properties like transition probability A, branching ratio βr, the radiative life time τR, and the emission cross-section σE for various emission levels of these glasses have been determined and reported. An attempt has also been made to throw some light on the environment of Ho3+ ions in PbO–Al2O3–B2O3 glass lattice.