Er^(3+)/Tm^(3+)共掺TeO_2-ZnO-Na_2O玻璃的近红外光谱特性及能量传递机理  

Near-Infrared Spectroscopic Properties and Energy Transfer Mechanism of Er^(3+)/Tm^(3+)-Codoped TeO_2-ZnO-Na_2O Glasses

作　　者：殷丹丹[1,2] 周亚训[1,2] 郑世超[1,2] 徐星辰[1,2] 王训四[1,2] 戴世勋[1,2] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]宁波大学红外材料及器件实验室,浙江宁波315211

出　　处：《中国激光》2013年第9期138-146,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(61178063);浙江省研究生创新科研项目(YK2010048);宁波大学王宽诚幸福基金;胡岚优秀博士基金

摘　　要：采用高温熔融退火法制备了一系列Er3+/Tm3+共掺碲酸盐玻璃,通过测量玻璃样品的热差扫描(DSC)曲线、吸收光谱、荧光光谱和荧光衰减曲线,结合计算Tm3+离子的Judd-Ofelt强度参数、自发辐射跃迁几率和辐射寿命等光谱参数,对800nm激光二极管(LD)抽运下Tm3+离子的1.85μm波段红外光谱特性进行了研究。结果显示,Er3+/Tm3+共掺碲酸盐玻璃具有良好的热稳定性,并随着玻璃中Tm3+离子掺杂浓度的增加,Er3+离子1.53μm波段荧光强度迅速减小,而Tm3+离子1.85μm波段荧光强度相应增大。对Tm3+离子的1.85μm波段发光过程分析表明,Tm3+离子红外荧光强度的增强归结于Tm3+:3 H4→Er3+:4I9/2、Er3+:4I11/2→Tm3+:3 H5及Er3+:4I13/2→Tm3+:3F4能级间能量传递的结果,由此进一步计算了能量传递微观系数、临界半径和声子贡献比。研究表明,Er3+/Tm3+共掺碲酸盐玻璃有望作为1.85μm波段光纤激光器的候选材料.A series of Er3＋/Tm3＋ codoped tellurite glasses are prepared using the high-temperature melt-quenching method and the 1.85 μm band infrared spectroscopic properties of Tm3＋ under the 800 nm LD excitation are investigated by measuring the differential scanning calorimeter （DSC） curves, absorption spectra, fluorescence spectra and fluorescence decay curves of glass samples, together with the calculations of the Judd-Ofelt intensity parameters, spontaneous radiative transition rates and radiative lifetimes of Tm3＋ ions. The results show that the Er3＋/Tm3＋ codoped tellurite glasses have good thermal stability and the 1.53 μm band fluorescence intensity of Er3＋ ions decreases rapidly, while the 1.85 μm band fluorescence intensity of Tm3＋ ions increases accordingly with the increase of Tm3＋ ion doping concentration. The analysis of 1.85 μm band luminescence processes indicates that the improvement of the infrared fluorescence intensity of Tm3＋ can be attributed to the comprehensive energy transfers of Tm3＋3H4→Er3＋4I9/2, Er3＋4I11/2→Tm3＋3H5, and Er3＋4I13/2→Tm3＋3F4, and the micro-parameters, critical radius and phonon contribution for the above energy transfer processes are calculated and analyzed further. The research demonstrates that the Er3＋/Tm3＋ codoped tellurite glass is a promising host material applied for the 1.85 μm band fiber lasers.

关 键 词：光纤光学 碲酸盐玻璃 ER3+ Tm3+共掺 1 85 μm波段红外荧光 能量传递 

分 类 号：TQ174[化学工程—陶瓷工业]