光子学报, 2014, 43 (6): 0616002, 网络出版: 2014-08-18
掺钕TeO2-Al2O3-Cs2O玻璃的Judd-Ofelt理论分析与光谱特性
Judd Ofelt Theory Analysis and Spectroscopic Properties of Nd3+-doped TeO2-Al2O3-Cs2O Tellurite Glasses
激光玻璃 钕离子 JuddOfelt理论 光谱特性 Laser glass Nd3+ ions JuddOflet theory TeO2Al2O3Cs2O TeO2Al2O3Cs2O spectroscopic properties
摘要
采用高温熔融法制备了组分为80TeO210Al2O310Cs2OxNd2O3(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JuddOfelt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0.5 mol%时,样品在1 060 nm波长处的σemi·τmeas为6.21×10-24cm2·s,荧光有效线宽为31.4 nm,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.
Abstract
A kind of tellurite glasses with the composition of 80TeO210Al2O310Cs2OxNd2O3 (x=0,0.5,1.0) (mol%) were fabricated by the conventional meltquenching 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 JuddOfelt theory analysis was made based on the absorption spectrum for each Nd3+doped tellurite glass. The three JuddOfelt intensity parameters Ωλ(λ=2,4,6) for Nd3+ in TeO2Al2O3Cs2O glass were obtained form the absorptive spectrum and an fluorescence effective linewidth Δλeff , radiative transition probabilities AJ for emission from 4F3/2 to the 4IJ (J=9/2, 11/2, 13/2, 15/2) manifolds, luminescence branching ratios β, corresponding radiative lifetime τrad and quantum efficiency η, the stimulated emission cross section for the 4F3/2→4I11/2 transition σemi as well.The TeO2Al2O3Cs2O tellurite glass doped with 0.5mol% Nd3+ possesses a good effective linewidth of 31.4nm, a high quantum efficiency of 89% and a large value of σemi·τmeas up to 6.21×10-24cm2·s for the transition from 4F3/2 to 4I11/2. Spectrum analysis results indicate that, the Nd3+doped TeO2Al2O3Cs2O tellurite glass is a kind of solid laser material with excellent performance.
秦忠雪, 袁孝, 熊宝星, 邹快盛, 张翔, 张桂菊. 掺钕TeO2-Al2O3-Cs2O玻璃的Judd-Ofelt理论分析与光谱特性[J]. 光子学报, 2014, 43(6): 0616002. QIN Zhongxue, YUAN Xiao, XIONG Baoxing, ZOU Kuaisheng, ZHANG Xiang, ZHANG Guiju. Judd Ofelt Theory Analysis and Spectroscopic Properties of Nd3+-doped TeO2-Al2O3-Cs2O Tellurite Glasses[J]. ACTA PHOTONICA SINICA, 2014, 43(6): 0616002.