Abstract
Spectroscopic properties of Sm3+, Tb3+ doped and Tb3+:Sm3+ co-doped lead fluorotellurite glasses have been studied in detail. On the excitation with 355 and 532 nm laser wavelengths, the luminescence properties of the singly and doubly doped glasses have been analyzed. Intensity of characteristic emission bands due to Sm3+ ions is appreciably enhanced in the presence of Tb3+ ions. This is due to the energy transfer from Tb3+ to Sm3+ ions. Different energy transfer parameters have also been calculated, which affirm an efficient energy transfer from Tb3+ to Sm3+ ions. (C) 2013 Elsevier B.V. All rights reserved.