Ho^(3+)/Tm^(3+)共掺Ge-Ga-S-CsI玻璃的2.0μm中红外发光特性的研究  

Mid-Infrared Emission Properties of Ho^(3+)/Tm^(3+)-Codoped Ge-Ga-S-CsI Glasses

作　　者：朱军[1] 戴世勋[1] 吴礼刚[1] 张魏[1] 沈祥[1] 王训四[1] 徐铁锋[1] 聂秋华[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《光谱学与光谱分析》2011年第4期894-897,共4页Spectroscopy and Spectral Analysis

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

摘　　要：用熔融急冷法制备了系列Ho3+/Tm3+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Ho3+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Ho3+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Tm3+离子掺杂浓度之间的关系,分析了Tm3+和Ho3+之间的能量转移机制。结果表明,Ho3+/Tm3+共掺的78GeS2-12Ga2S3-10CsI玻璃是一种理想的2μm激光基质材料。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.

关 键 词：中红外发光 硫卤玻璃 Ho3+/Tm3+共掺 

分 类 号：TQ171.1[化学工程—玻璃工业]