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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Optical transitions of rare earth ions for amplifiers: how the local structure works in glass
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Optical transitions of rare earth ions for amplifiers: how the local structure works in glass

机译：放大器中稀土离子的光学跃迁：玻璃中的局部结构如何工作

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摘要

Several properties of 4f optical transitions of rare earth ions in glasses utilized as optical amplifiers for telecommunications are discussed. For the Er~(3+): 1.55 #mu#m transition, the role of Judd-Ofelt #OMEGA#_6 parameters is presented. With compositional change in structure of aluminosilicate glasses, the changes of the radiative cross section, quantum efficiency, and flatness, is observed, which are especially important for the amplifiers in the wavelength-division-multiplexing (WDM) network system. Moreover, the energy level structures and resultant spectral properties of Pr~(3+), Nd~(3+) and Dy~(3+) ions, all of which are 1.3 #mu#m-active ions, are compared. The hypersensitivity of Dy~(3+) transitions appears especially in chalcogenide glasses, where the non-radiative loss due to multiphonon emissions is minimized. Compositional variations of the branching ratio and radiative cross sections, and their dependence on the #OMEGA#_2 parameters, which are affected by the asymmetry of the rare earth ions sites, are discussed.
机译：讨论了用作电信光放大器的玻璃中稀土离子的4f光学跃迁的一些特性。对于Er〜（3+）：1.55＃mu＃m跃迁，提出了Judd-Ofelt＃OMEGA＃_6参数的作用。随着硅铝酸盐玻璃结构的组成变化，观察到辐射截面，量子效率和平面度的变化，这对于波分复用（WDM）网络系统中的放大器尤其重要。此外，比较了均为1.3＃mu＃m活性离子的Pr〜（3 +），Nd〜（3+）和Dy〜（3+）离子的能级结构和所得光谱性质。 Dy〜（3+）跃迁的超敏性尤其出现在硫族化物玻璃中，其中由于多声子发射引起的非辐射损失最小。讨论了支化比和辐射截面的组成变化及其对＃OMEGA＃_2参数的依赖性，这些变化受稀土离子位点的不对称性影响。

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