The structural properties of Er 3+ : silver lead borate glass is assessed by means of SEM, X-ray mapping, EDS and Raman analysis. In order to verify the time dependency of emission spectra, steady-state luminescence spectroscopy (SSLS) and time-resolved emission spectroscopy (TRES) studies have been performed. The stimulated emission cross-sections for the NIR emission transition 4 I 13/2 → 4 I 15/2 (1535nm) at 970nm excitation are reported. The decay times were obtained by fitting one (τ m =0.301ms) and two (τ m1 =0.141ms, τ m2 =0.368ms) distributions for the NIR transition. Furthermore, by making use of TRES measurements the decay associated spectra were obtained allowing the time dependency for the different emission bands to be elucidated.