Abstract: 70.75TeO2-19ZnO-9.5La2O3-0.75Tm2O3-xYb2O3 was prepared by high temperature melt cooling method.Differential scanning calorimetry was used to analyze the stability of the glass samples, and all samples had good thermal stability according to the results.UV-Visible-Near infrared spectrophotometer was used to measure the absorption spectrum, Judd-Ofelt strength paranmeters, spontaneous emission probability A, fluorescence branching ratio β and radiative lifetimes τR spectral parameters were calculated by using Judd-Ofelt theory.Results show that when the Yb3+-doped concentration reaches to 0.625mol;, the Tm3+ ions has the longest lifetime of 3H4 which is 0.443 ms, and it is possible to be a promising matrix material for S-band broadband optical fiber amplifier.

Key words: 70.75TeO2-19ZnO-9.5La2O3-0.75Tm2O3-xYb2O3 was prepared by high temperature melt cooling method.Differential scanning calorimetry was used to analyze the stability of the glass samples, and all samples had good thermal stability according to the results.UV-Visible-Near infrared spectrophotometer was used to measure the absorption spectrum, Judd-Ofelt strength paranmeters, spontaneous emission probability A, fluorescence branching ratio β and radiative lifetimes τR spectral parameters were calculated by using Judd-Ofelt theory.Results show that when the Yb3+-doped concentration reaches to 0.625mol;, the Tm3+ ions has the longest lifetime of 3H4 which is 0.443 ms, and it is possible to be a promising matrix material for S-band broadband optical fiber amplifier.