Effect of host glass on the optical absorption properties of Nd3+, Sm3+, and Dy3+ in lead borate glasses.
Effect of host glass on the optical absorption properties of Nd3+, Sm3+, and Dy3+ in lead borate glasses.
复制标题
DOI：
10.1103/physrevb.53.6186
复制
发表时间：
1996-03
期刊：
影响因子：
--
通讯作者：
M. Saisudha;J. Ramakrishna
中科院分区：
文献类型：
--
作者：
M. Saisudha;J. Ramakrishna
采用Judd-Ofelt理论，分析了PbO含量在30 ~ 70 mol %范围内的硼酸铅玻璃中，基体玻璃成分对Nd^{3+}$、Sm^{3+}$和Dy^{3+}$光吸收光谱的影响，并确定了超敏波段的组分依赖关系。Judd-Ofelt强度参数$\Omega_t$ （t=2,4,6）和辐射跃迁概率。$\ omega__2 $随PbO含量的变化归因于稀土(R)位点配体场的不对称性和R- o共价的变化，而$\Omega_6$的变化则与R- o共价的变化有关。稀土离子在硼酸铅玻璃中的辐射跃迁概率很大，表明它们适合激光应用。
The effect of host glass composition on the optical absorption spectra of $Nd^{3+}$, $Sm^{3+}$, and $Dy^{3+}$ in lead borate glasses, with PbO contents varying from 30 to 70 mol %, has been analyzed using Judd-Ofelt theory and the compositional dependence has been determined for the hypersensitive bands. Judd-Ofelt intensity parameters $\Omega_t$ (t=2,4,6), and the radiative transition probabilities. The variation of $\Omega_2$ with PbO content has been attributed to changes in the asymmetry of the ligand field at the rare-earth (R) site due to the structural changes and to changes in R-O covalency, whereas the variation of $\Omega_6$ has been related to the variation in R-O covalency. The radiative transition probabilities of the rare-earth ions are large in lead borate glasses suggesting their suitability for laser applications.