Optical properties of Sm 3+ doped lead fluoroborate glasses (original) (raw)

We present a study of emission, absorption and vibrational properties of Sm 3ϩ doped lead fluoroborate glasses (PbO-PbF 2 -B 2 O 3 -Sm 2 O 3 ) as a function of the Sm 3ϩ content. Changes in the position and the intensity parameters of the transitions are closely related to structural changes in the glass network. A Judd-Ofelt scheme was used to estimate the intensity parameters V l and radiative properties for Sm 3ϩ in the glass. The behaviour of V 2 and V 6 parameters suggested a decrease in the asymmetry degree of the local ligand field at Sm 3ϩ sites and an increase in the covalency of Sm-O bond, respectively. This hypothesis was verified by analysing the structural role of Sm 2 O 3 through Raman and infrared spectroscopy measurements. ᭧