Tm^<3+>ドープテルライトガラスの通信波長帯域における発光特性の濃度依存性

概要

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Concentration dependence of emission properties and lifetimes of Tm^<3+> doped tellurite glasses in telecommunication wavelength region were investigated. According to Judd-Ofelt analysis, it was clarified that the quantum efficiency of 1.46 μm in Tm^<3+> -doped tellurite glasses was almost equal to that in fluoride glasses, which were used as host materials for Tm^<3+> -doped fiber amplifiers (TDFA). The emission intensity ratio of the 1.80 μm band to the 1.46 μm band increased with increasing Tm^<3+> content. Moreover, the lifetimes of the H_4 level decreased rapidly with increasing Tm^<3+> content. These results show that tellurite glass is useful as host materials of TDFA and in order to achieve a high quantum efficiency of 1.46 μm emission in tellurite glasses, the concentration of Tm^<3+> should be low so that cross relaxation can be suppressed.
社団法人日本セラミックス協会の論文
2002-04-01