Er, Yb共掺氧化钇透明陶瓷的Judd-Ofelt参数计算

Judd-Ofelt Analysis of the Er, Yb Co-doped Y2O3 Transparent Ceramics

摘要:

本文应用Judd-Ofelt方法对真空烧结的Er, Yb共掺氧化钇透明陶瓷的光谱学参数进行了研究。文章通过实验方法测得了不同Er₃₊掺杂量的Er, Yb共掺氧化钇透明陶瓷的室温吸收光谱和折射率,并结合Judd-Ofelt方法计算了不同Er₃₊掺杂浓度时的光谱学参数。随着Er₃₊掺杂量的增加,Ω₂从5.41减小至3.36。 Ω₄和Ω₆的范围分别为0.96~1.29和0.64~0.72。 品质因子X_4/6的范围为1.46~1.88,显著优于Er掺杂氧化钇单晶中的品质因子。随着Er₃₊掺杂量从0.5 at.%增加至5 at.%,₄I_13/2能级的寿命从8.7ms下降至7.8ms。本文的计算结果表明,低掺杂浓度的Er,Yb共掺氧化钇透明陶瓷是一种有潜力的近红外激光材料。

Abstract:

This paper presents a spectroscopic study of Er, Yb co-doped Y₂O₃ transparent ceramics with 20 at.% Yb₃₊ and varied Er₃₊ concentration (0.5 at.% to 5 at.%). Room-temperature absorption spectra and refractive indices were measured. Standard Judd-Ofelt analysis was applied and the intensity parameters were calculated. With Er₃₊ concentration increasing, Ω₂ decreases from 5.41 to 3.36, Ω₄ ranges from 0.96 to 1.29 and Ω₆ ranges from 0.64 to 0.72. The spectroscopic quality factor X_4/6 ranges from 1.46 to 1.88. The radiative lifetime of ₄I_13/2 manifold is longest in the Er, Yb co-doped Y₂O₃ transparent ceramic with 0.5 at.% Er₃₊ content. All suggest that the Er, Yb co-doped Y₂O₃ transparent ceramic could be a potential material for near-infrared laser application.