测量了不同Yb3+离子掺杂浓度下,Er3+/Yb3+共掺SiO2-Al2O3-La2O3玻璃的吸收光谱、荧光光谱和Yb3+离子2F5/2的能级寿命,应用迈克康伯(McCumber)理论计算了Er3+的受激发射截面σemi,讨论了Yb3+离子浓度对其自身吸收性质、Er3+离子发光性质,以及Yb3+→Er3+能量传递效率(η)的影响,初步探明该基质玻璃中Yb3+离子掺杂数浓度的最佳范围为3.94×1020 cm-3至5.92×1020 cm-3,在此掺杂范围内,Yb3+离子的最大吸收系数为9.8 cm-1,Er3+的峰值发射截面和Yb3+→Er3+能量传递效率(η)分别为0.64×10-24 m2和92%.

Absorption spectra, emission spectra and fluorescence time of 2F 5/2 energy level of Yb 3+ with different Yb 3+ ions concentration Er 3+ /Yb 3+ codoped SiO 2 Al 2O 3-La 2O 3 glasses have been measured. The effect of Yb 3+ ions concentrations on the absorption characteristics of Yb 3+ , stimulated emission spectra characteristics of Er 3+ , and the energy transfer efficiency from Yb 3+ to Er 3+ have been discussed. The result show that the optimal range of Yb 3+ ions concentration in this glass are from 3.94 to 5.92×10 20 cm -3 . In the optimal range of Yb 3+ ions concentrations, the maxim absorption coefficient of Yb 3+ is 9.8 cm -1 , the highest stimulated cross section of Er 3+ and the energy transfer coefficient η from Yb 3+ to Er 3+ are 0.64 pm 2 and 92% respectively.