Abstract
High dense tellurite glass with system 80TeO(2)-5Bi(2)O(3)-15WO(3)-doped with (0, 2000, 10000 ppm Er2O3) (labeled TBW, TBW: 1000 ppm Er2O3 and TBW: 20000 ppm Er2O3) were prepared. Physical parameters such as density (rho), glass transition temperature (T-g), thermal stability (Delta T), optical energy gap and refractive index (n), of prepared glasses were evaluated. Moreover, oxygen packing density (O.p.d), molar volumes (V-m), oxygen molar volume (V-O), molar refraction (R-m), metallization criterion (M), molar polarizability (alpha(m)), the nonlinear refractive index (n(2)), two photon absorption TPA, and third order susceptibility, chi((3)), of prepared glasses have been determined. The Judd-Ofelt parameters (Omega(lambda)) (lambda = 2, 4, 6), oscillator strength type transition probabilities, spectroscopic quality factors, branching ratio and radiative lifetimes of several excited states of Er3+ have been estimated. The glasses with composition 80TeO(2)-5Bi(2)O(3)-15WO(3) doped with 10000 ppm Er2O3 has high effective emission cross section bandwidth (73.563 nm) for laser transition I-4(13/2) -> I-4(15/2) and large stimulated emission cross-section (1.04.10(-20) cm(2)). Computing physical and spectroscopic properties indicate that these glasses doped with Er3+ are a promising candidate for optical applications.