Erbium (Er3+)-doped alkali lead tellurofluroborate (RLTB) glasses were prepared and characterized systematically through optical absorption and emission measurements. The emission spectra in the range 450-900 and 1400-1800nm were recorded by exciting the samples with 532nm (Nd:YVO4 crystal) and 514.5nm (Ar+) laser, respectively. Applying Judd-Ofelt analysis, the intensity parameters have been determined using experimental oscillator strengths of absorption bands. From the Judd-Ofelt intensity parameters, some important fluorescence properties such as spontaneous transition probabilities, radiative lifetimes and luminescence branching ratios and emission transitions in RLTB glasses have been calculated. From evaluated radiative parameters, it is suggested that these RLTB glasses are more suitable candidates for 0.85 and 1.54um broadband optical amplifiers.
