Investigation on structure and optical properties of Er3+, Eu3+ single-doped Na2O–ZnO–B2O3–TeO2 glasses

Er3+, Eu3+ single-doped several glasses with various composition xB2O3–(80−x)TeO2–10ZnO–10Na2O (x increases by a step of 10) were prepared by a melt-quenching technique. The effects of composition on density, molar volume, refractive index, and phonon sideband spectra were investigated. The dependence of glass structure properties on the composition was discussed. The influence of composition on the radiative and non-radiative relaxation rate, lifetime, and quantum efficiency of the level 4I13/2 of Er3+ in these various glasses were studied. Upon 980 nm excitation, the composition dependence of up-conversion and down-conversion emission was studied.