不同Yb掺杂量的Yb:Y3Al5O12晶体的光谱分析

采用提拉法生长了Yb³⁺掺杂量分别为5.4at%, 16.3at%, 27.1at%, 53.6at%和100at%的Yb:Y₃Al₅O₁₂晶体.系统地表征和分析了Yb³⁺掺杂量对晶体吸收光谱和荧光光谱的影响.随着Yb³⁺掺杂量的增加，各峰值吸收系数呈线性增加的趋势.应用Smakula公式计算了各吸收峰对应的振荡强度，并分析了Yb³⁺掺杂量对振荡强度的影 关键词： 吸收光谱 荧光光谱 自吸收 浓度猝灭

Spectra analysis of Yb: Y3Al5O12 crystals with different Yb doping concentration

Yb:Y_3Al_5O_ 12 (Yb:YAG) single crystals with Yb 3+ doping level of 5.4at%, 16.3at%, 27.1at%, 53.6at%, and 100at% were grown by the Czochralski method. The effects of different Yb 3+ doping level on the absorption spectra and fluorescence spectra were studied. The results showed that the real absorption coefficient of the absorption peaks increases linearly with the increasing of Yb 3+ doping level in Yb:YAG crystals. Absorption band oscillator strengths of Yb:YAG crystals were calculated with Smakula formula and the effects of different Yb 3+ doping level on the oscillator strengths were also studied. The concentration quenching of fluorescence was observed when the Yb 3+ doping level reached 27.1at% in Yb:YAG crystals. The shape of fluorescence spectra of Yb:YAG could be significantly influenced when the Yb 3+ doping level is higher than 53.6at%.