b^(3+)掺杂浓度对Er^(3+)/Yb^(3+)共掺SiO_2-Al2_O_3-La_2O_3玻璃光谱性质的影响

Effect of Yb^(3+) Ion Concentration on Spectroscopic Properties of Er^(3+)/Yb^(3+)-Codoped SiO_2-Al_2O_3-La_2O_3 Glass

测量了不同Yb3+ 离子掺杂浓度下 ,Er3+ /Yb3+ 共掺SiO2 Al2 O3 La2O3玻璃的吸收光谱、荧光光谱和Yb3+离子2 F5/ 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× 1 0 2 0 cm- 3至 5 .92× 1 0 2 0 cm- 3,在此掺杂范围内 ,Yb3+ 离子的最大吸收系数为9.8cm- 1 ,Er3+ 的峰值发射截面和Yb3+ →Er3+ 能量传递效率 (η)分别为 0 64× 1 0 - 2 4 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.