Yb^(3+)掺杂SiO_2-Bi_2O_3-B_2O_3玻璃的物理性质及光谱性质

Physical and Spectroscopic Properties of Yb^3+-doped SiO_2-Bi_2O_3-B_2O_3 Glasses

选取玻璃组分60SiO_2-xBi_2O_3-(30-x)B_2O_3-2K_2O-7Na_2O-1Yb_2O_3(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Yb^(3+)离子的受激发射截面(σemi),并且计算了Yb^(3+)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Bi_2O_3和B_2O_3的组成变化对其物理性质、Yb^(3+)离子的吸收特性、发光特性以及OH^-离子对实测Yb^(3+)荧光寿命(T_f)的影响。结果表明:Yb^(3+)掺杂的Si_2-Bi_2O_3-B_2O_3具有较好的光谱性能,是一种新型的Yb^(3+)掺杂双包层光纤候选基质材料。

Yb3+-doped 60 SiO2-xBi(2)O(3)-(30-x)B2O3-2K(2)O-7Na(2)O-1Yb(2)O(3) (x=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 T-g, T-f decrease with the increase of Bi2O3 content. The system of 60 SiO2-15Bi(2)O(3)-15B(2)O(3)-2K(2)O-7Na(2)O-1Yb(2)O(3) glass possesses higher asymmetry. This sample exhibits higher peak absorption cross section(gabs) and integrated absorption cross section (Sigma(abs)):1.97pm(2) and 5.32x10(4)pm(3) respectively. Also this glass has higher spontaneous emission probability (A(rad)) 1620S(-1), the tau(rad) (calculated emission lifetime) is 0.617ms. The measured emission lifetime(tau(f)) has strong relations with the OH- content in glasses, as the B2O3 content increases from 0mol% to 30mol%, the tau(m) increases from 0.39 to 0.87ms.