【摘要】 选取玻璃组分60SiO₂-xBi₂O₃-（30-x）B₂O₃-2K₂O-7Na₂O-1Yb₂O₃（以mol％记,x=0,5,10,15,20,25,30）为研究对象。通过测试试样的物理性质和光谱性质,应用倒易法（reciprocity method）计算Yb³⁺离子的受激发射截面（σemi）,并且计算了Yb³⁺的自发辐射几率(A_rad),2F5/2能级的辐射寿命(T_rad)。讨论了玻璃中Bi₂O₃和B₂O₃的组成变化对其物理性质、Yb³⁺离子的吸收特性、发光特性以及OH^-离子对实测Yb³⁺荧光寿命（T_f）的影响。结果表明:Yb³⁺掺杂的Si₂-Bi₂O₃-B₂O₃具有较好的光谱性能,是一种新型的Yb³⁺掺杂双包层光纤候选基质材料。更多还原

【Abstract】 Yb3+-doped 60 SiO2-xBi2O3-(30-x)B2O3-2K2O- 7Na2O-1Yb2O3(z=0, 5, 10, 15, 20, 25, 30) were prepared. The physical and spectroscopic properties of Yb3+doped SiO2- Bi2O3-B2O3 were studied. The refractive index, density of Yb3+ doped SiO2-Bi2O3-B2O3 glasses increase with the increase of Bi2O3 content, while the Tg, Tf decrease with the increase of Bi2O3 content. The system of 60 SiO2-15Bi2O3-15B2O3-2K2O-7Na2O-1Yb2O3 glass possesses higher asymmetry. This sample exhibits higher peak absorption cross section(σabs) and integrated absorption cross section (∑abs): 1.97pm2 and 5.32×104pm3 respectively. Also this glass has higher spontaneous emission probability(Arad) 1620S-1, the τrad (calculated emission lifetime) is 0.617ms. The measured emission lifetime(τf) has strong relations with the OH- content in glasses, as the B2O3 content increases from Omol% to 30mol%, the τm increases from 0.39 to 0.87ms.更多还原