掺铥锗酸盐激光玻璃光谱特性定量计算与预测  

Quantitative Calculation and Prediction of Spectroscopic Properties of Thulium-doped Germanate Laser Glass

作　　者：贾延琪 董双丽[1] 肖永宝 JIA Yanqi;DONG Shuangli;XIAO Yongbao(Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学发光材料与器件国家重点实验室,广东省光纤激光材料与应用技术重点实验室,广东广州510640

出　　处：《发光学报》2023年第5期889-897,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52130201,52172003)。

摘　　要：掺稀土激光玻璃是光纤激光器的核心工作介质,如何定量计算预测激光玻璃的光学光谱特性是加快高性能激光玻璃研发的挑战之一。本文以掺铥(Tm^(3+))二元锗酸盐激光玻璃为例,将相图中的“一致熔融化合物”视为玻璃的组成/结构“基元”,基于掺Tm^(3+)基元玻璃的物理和光谱性质的实验值利用杠杆规则计算预测了锗酸盐激光玻璃相应的性质,如密度、折射率、有效线宽、吸收/发射截面、辐射寿命、增益带宽等。结果表明,物理性质和光谱特性的预测值与实验值吻合度较高,预测误差绝对值分别小于4.61%和9.66%。此外,该方法能够准确预测掺Tm^(3+)锗酸盐玻璃的物理性质和光谱特性随组分的变化趋势,包括线性规律和“锗反常”现象,有助于解析激光玻璃组成-结构-性质的内在关联。本研究有望为激光玻璃的性质预测和成分设计提供指导。Rare-earth-doped laser glass is the key medium of fiber lasers.However,how to predict the spectroscop-ic properties quantitatively remains a challenge to accelerate the development of high-performance laser glass.Here we regard the nearest-neighboring congruently melting compound(CMC)as the component and structural“motif”of glass based on the phase diagram model and apply it to the Tm3+-doped binary germanate laser glass systems.The ex-perimental properties of Tm3+-doped glassy CMCs are utilized to calculate and predict the physical and spectroscopic properties,such as density,refractive index,effective linewidth,absorption/emission cross-sections,radiation life-time,etc.,of germanate laser glass by utilizing the leverage rule.The results illustrate that the predicted physical and spectroscopic properties are in good agreement with the experimental values,with the maximum absolute errors of less than 4.61%and 9.66%,respectively.Moreover,the phase diagram approach can capture the trends of physi-cal and spectroscopic properties as a function of composition,including the linearly or germanate-anomaly composi-tional dependence,which provides an opportunity to decipher the composition-structure-property relationships of la-ser glass.This study is expected to shed light on the property prediction and composition design of laser glass.

关 键 词：激光玻璃 光谱特性 定量预测 相图模型 

分 类 号：TQ171.7[化学工程—玻璃工业] TN244[化学工程—硅酸盐工业]