Optical absorption and fluorescence studies of Dy3+-doped lead telluroborate glasses

► Interaction among Dy3+ ions at higher concentrations causes concentration quenching. ► The radiative properties are determined within the frame work of Judd-Ofelt theory. ► Variation of decay time of 4F9/2 emission state is attributed to interactions among the Dy3+ ions at higher concentration. ► The PTBDy10 glass is a suitable material for 576 nm laser applications.