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Pr~（3＋）/Ho~（3＋）共掺Ge-Ga-Se玻璃的2.9μm荧光特性的研究

ISSN号：1000-3290
期刊名称：《物理学报》
时间：0
分类：O782[理学—晶体学]
作者机构：[1]宁波大学信息科学与工程学院,宁波315211
相关基金：国家自然科学基金（批准号：60878042 60978058）; 浙江省自然科学基金（批准号：Y1090996）; 宁波市科技创新团队项目（批准号：2009B21007）; 宁波大学王宽诚幸福基金资助的课题

作者：朱军[1], 戴世勋[1], 王训四[1], 沈祥[1], 徐铁峰[1], 聂秋华[1]

关键词：中红外发光, 硫系玻璃, Ho3+/Pr3+共掺, mid-infrared luminescence, chalcogenide glass, Pr3 ＋ /Ho3 ＋ codoped

中文摘要：

采用熔融冷却法制备了系列Ho3＋/Pr3＋共掺的Ge25Ga10Se65玻璃样品,测试了样品的吸收光谱以及908nm激光抽运下的中红外荧光光谱和Ho3＋离子5I7能级寿命.计算了Ho3＋：5I7→5I8发射截面和Pr3＋：3H4→3F2吸收截面,讨论了Ho3＋,Pr3＋离子之间的能量转移效率及Pr3＋离子浓度的影响.通过拟合Ho3＋离子2.0μm荧光衰减曲线判断能量转移机理.结果表明,Ho3＋掺杂Ge25Ga10Se65玻璃中引入Pr3＋离子可以有效提高Ho3＋离子的2.9μm荧光强度.

英文摘要：

A series of chalcogenide glasses based on Ge25 Ga10 Se65 system co-doped with Ho3 ＋ /Pr3 ＋ ions of different ratios were synthesized by melt-quenching technique. The absorption spectra,mid-infrared fluorescence and lifetime of glass samples under 908 nm laser excitation were measured. The emission cross section of Ho3 ＋：5I7 →5 I8 and absorption cross section of Pr3 ＋：3H4 → 3F2 were calculated. The energy transfer efficiency between Ho3 ＋ and Pr3 ＋ ions with different Pr3 ＋ ion concentrations have been discussed. Through fitting the 2. 0 μm fluorescence decay curves of Ho3 ＋ ions,the energy transfer regime was judged. The results prove that Tm3 ＋ is an efficient sensitizer which enhances the Ho3 ＋： 2. 9 μm fluorescence intensity significantly.

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