Optical properties of Lead bismuth borate glasses doped with neodymium oxide

Abstract Neodymium doped Lead bismuth borate glasses with the composition of 25PbO–25Bi 2 O 3 –50B 2 O 3 : x Nd 2 O 3 , where x  = 0.5, 1, 1.5 and 2 mol%, have been prepared by melt quenching technique. The behavior of the density and molar volume allows concluding that, addition of Nd 2 O 3 leads to the formation of non-bridging oxygen. Rare earth ion parameters have been calculated and studied. The optical band gap ( E g ), and band tails ( E e ) were determined. Judd–Ofelt theory for the intensity analysis of induced electric dipole transitions has been applied to the measured oscillator strengths of the absorption bands to determine the three phenomenological intensity parameters Ω 2 , Ω 4 and Ω 6 for glass. It was observed that the deviation parameters, rms, was found to be 0.56:0.58 (×10 −6 ). The estimated Judd–Ofelt parameters were found to be Nd 2 O 3 concentration dependent. The hypersensitive transition, 4 I 9/2  →  4 G 5/2  +  2 G 7/2 , is closely related to Ω 2 parameter.