标题：The effects of Ho3+and Pr3+ions on the spectroscopic properties of Er3+doped SrGdGa3O7crystals used in mid-infrared lasers
作者：Xia, Houping ;Feng, Jianghe ;Wang, Yan ;Li, Jianfu ;Ji, Yuexia ;Jia, Zhitai ;Tu, Chaoyang
作者机构：[Xia, Houping ;Wang, Yan ;Li, Jianfu ;Tu, Chaoyang ] Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on 更多
来源：Journal of Physics D: Applied Physics
摘要：Ho3+and Pr3+ions were introduced into Er3+: SrGdGa3O7crystal, respectively, for enhanced 2.7 μm emissions. The effects of Ho3+and Pr3+on the spectroscopic properties and mutual energy transfer mechanisms were investigated. It is found that the introductions of Ho3+and Pr3+are helpful to achieve enhanced mid-infrared emissions and reduced near-infrared emissions. The up-conversion emission in Er3+/Ho3+: SrGdGa3O7crystal was stronger than that in Er3+: SrGdGa3O7crystal, while that in Er3+/Pr3+: SrGdGa3O7crystal was decreased. Introducing Ho3+and Pr3+depopulated the lower laser lever through energy transfer and thus reduced the fluorescence lifetime of Er3+:4I13/2in Er3+/Ho3+: SrGdGa3O7and Er3+/Pr3+: SrGdGa3O7crystals to 1/2 and 1/10 of that in Er3+: SrGdGa3O7crystal without significantly affecting the fluorescence lifetime of the upper laser level Er3+:4I11/2, which greatly reduces the self-saturation problem. However, with reduced up-conversion emission and a weaker self-termination effect, Pr3+is a more appropriate sensitizer than Ho3+for Er3+in this crystal. All the results imply that Er3+/Pr3+: SrGdGa3O7crystal could act as a potential gain media for an enhanced 2.7 μm MIR laser.
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