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Yb^3＋/Ho^3＋共掺Ge25Ga5S70玻璃中红外发光特性

ISSN号：0454-5648
期刊名称：《硅酸盐学报》
时间：0
分类：TQ171.1[化学工程—玻璃工业;化学工程—硅酸盐工业]
作者机构：[1]宁波大学信息科学与工程学院,浙江宁波315211
相关基金：国家自然科学基金项目（60878042 60978058）; 宁波市科技创新团队项目（2009B21007）; 宁波大学王宽诚幸福基金项目资助

关键词：中红外发光, 硫卤玻璃, Ho3+/Tm3+共掺, Mid-infrared luminescence, Chalcogenide glass, Ho3＋/Tm3＋ codoped

中文摘要：

用熔融急冷法制备了系列Ho^3＋/Tm^3＋共掺的78GeS2-12Ga2S3-10CsI玻璃样品,测试了样品的吸收光谱以及808 nm激光泵浦下的2μm中红外荧光光谱。用Judd-Ofelt理论计算了Ho^3＋离子在78GeS2-12Ga2S3-10CsI硫卤玻璃中的强度参数Ωi（i=2,4,6）、自发辐射跃迁概率Arad和辐射寿命rτ等光谱参数,以及Ho^3＋离子在2μm处的吸收截面aσ、发射截面eσ和增益系数G（λ）。讨论了808 nm激光泵浦下的样品中红外荧光特性与Tm^3＋离子掺杂浓度之间的关系,分析了Tm^3＋和Ho^3＋之间的能量转移机制。结果表明,Ho^3＋/Tm^3＋共掺的78GeS2-12Ga2S3-10CsI玻璃是一种理想的2μm激光基质材料。

英文摘要：

A serial of chalcogenide glasses based on 78GeS2-12Ga2S3-10CsI（in molar%） system doped with the different radios of Ho^3＋/Tm^3＋ ions were synthesized by melt-quenching method.Their absorption spectra and mid-infrared fluorescence under 808 nm laser excitation were measured.According to Judd-Ofelt theory,the intensity parameters Ωi（i=2,4,6）,spontaneous transition probabilities Arad and radiative lifetomes τr for Ho^3＋ ion were calculated.Absorption cross-sections σa,emission crosssections σe and gain coefficient G（λ） corresponding to the emission of Ho^3＋ ions at 2.0 μm were obtained.By changing the Tm^3＋ concentration,the energy transfer regime of Tm^3＋ and Ho^3＋ ions under 808 nm excitation was investigated.The results show that Ho^3＋/Tm^3＋-codoped Ge-Ga-S-CsI glasses would be a potential material for 2.0 μm emission.

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