掺钕TeO_2-Al_2O_3-Cs_2O玻璃的Judd-Ofelt理论分析与光谱特性  

Judd-Ofelt Theory Analysis and Spectroscopic Properties of Nd^(3+)-doped TeO_2-Al_2O_3-Cs_2O Tellurite Glasses

作　　者：秦忠雪[1,2] 袁孝[1,2] 熊宝星[1,2] 邹快盛[1,2] 张翔[1,2] 张桂菊[1,2] 

机构地区：[1]苏州大学现代光学技术研究所江苏省先进光学制造技术重点实验室 [2]教育部/江苏省现代光学技术重点实验室,江苏苏州215006

出　　处：《光子学报》2014年第6期52-57,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.91023009;61108024);国家自然科学基金委员会和中国工程物理研究院联合基金(Nos.11176021;11076021);江苏省高校自然科学研究项目(Nos.10KJA140045;09KJB140008);江苏省优势学科项目资助

摘　　要：采用高温熔融法制备了组分为80TeO2-10Al2O3-10Cs2O-xNd2O3(x=0,0.5,1.0)(mol%)的掺钕碲酸盐玻璃,测试了玻璃样品的折射率、吸收光谱、荧光光谱和荧光寿命曲线.利用Judd-Ofelt理论计算得到光谱强度参数Ωλ(λ=2,4,6),Nd3+从4F3/2能级到4IJ(J=9/2、11/2、13/2、15/2)能级跃迁的荧光有效线宽Δλeff,4F3/2能级跃迁几率AJ,荧光分支比β,相应的荧光寿命τrad和量子效率η及受激发射截面σemi.在该碲酸盐体系中,Nd3+离子掺杂浓度为0.5mol%时,样品在1 060nm波长处的σemi·τmeas为6.21×10-24cm2·s,荧光有效线宽为31.4nm,量子效率达到89%.光谱特性对比分析结果表明,该掺钕碲酸盐玻璃是一种性能优良的固体激光材料.A kind of tellurite glasses with the composition of 80TeO2-10Al2O3-10Cs2O-xNd2O3（x=0,0.5,1.0）（mol%） were fabricated by the conventional melt-quenching method. The index of refraction of the glass was measured. The absorption apectra, fluorecence spectra and fluerecence decay cures of Nd3＋ in the glass were recorded. A Judd-Ofelt theory analysis was made based on the absorption spectrum for each Nd3＋-doped tellurite glass. The three Judd-Ofelt intensity parameters Ωλ （λ = 2,4,6） for Nd3＋ in TeO2-Al2O3-CszO glass were obtained form the absorptive spectrum and an fluorescence effective linewidth △λeff, radiative transition probabilities Aj for emission from 4 F3/2 to the 4Ij （J = 9/2, 11/2, 13/2, 15/2） manifolds, luminescence hranching ratios fl, corresponding radiative lifetime πrad and quantum efficiency η, the stimulated emission cross section for the 4 F3/2 →4 I11/2 transition σemi as well. The TeO2- Al2O2-Cs2O tellurite glass doped with 0.5mol% Nd3＋ possesses a good effective line-width of 31.4nm, a high quantum efficiency of 89 % and a large value of σemi·τmeas up to 6. 21 × 10^-24 cm2 · s for the transition from 4 F3/2 to 4 I11/2. Spectrum analysis results indicate that, the Nd3＋-doped TeO2-Al2O3-Cs2O tellurite glass is a kind of solid laser material with excellent performance.

关 键 词：激光玻璃 钕离子 JUDD-OFELT理论 TeO2-Al2O3-Cs2O 光谱特性 

分 类 号：TN244[电子电信—物理电子学] TN241