Yb3+浓度对掺铥碲酸盐玻璃的热稳定性及光谱性能的影响

采用高温熔融冷淬法制备70.75TeO2-19ZnO-9.5La2O3-0.75Tm2O3-xYb2O3碲酸盐玻璃,使用差示扫描量热仪(DSC)分析了玻璃样品的热稳定性,表明样品均具有良好的热稳定性.根据紫外-可见-近红外分光光度计测量得到的玻璃吸收光谱,结合Judd-Ofelt理论,计算了Tm3+在玻璃中的Judd-Ofelt强度参数、自发辐射概率A、荧光分支比β和辐射寿命τR等光谱参数.结果表明,当Yb3+掺杂浓度为0.625mol;时,Tm3+在3H4处的荧光寿命最长,为0.443 ms,表明铥镱共掺杂碲酸盐玻璃有望成为一种理想的S波段光纤放大器用基质材料.

Effects of Yb3+ Concentration on the Thermal Stability and SpectroscopicProperties of Thulium Doped Tellurite Glasses

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.