Optical and luminescence studies of Pr3+ and Er3+ doped different phosphate glasses

Abstract

Abstract Optical absorption and emission spectra of Pr 3+ and Er 3+ doped different chlorophosphate glasses have been studied. Optical properties of these two rare earth ions were characterized through optical absorption and emission spectra using Judd–Ofelt theory. Judd–Ofelt intensity parameters Ω λ ( λ =2, 4 and 6) are calculated for both the ions from their absorption spectra, which in turn used to derive the radiative properties such as radiative transition probabilities ( A T ), radiative lifetimes ( τ R ), branching ratios ( β ) and integrated absorption cross-sections ( Σ ). An attempt has been made to discuss structural changes considering the hypersensitive transitions and covalency of rare earth oxygen (RE-O) bonds for the present glass systems. From emission spectra, peak emission cross-sections ( σ P ) are obtained for the observed emission bands of Pr 3+ and Er 3+ ions in all these chlorophosphate glasses. Variation of peak emission cross-sections with the glass matrix has been studied.