掺Er^(3+)硼硅酸盐玻璃的吸收光谱与J-O理论分析  

Absorption spectra and Judd-Ofelt theory analysis of Er^(3+) doped borosilicate glass

作　　者：张其土[1] 沐磊[1] 黄强[1] 付振晓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《光学技术》2008年第3期365-367,371,共4页Optical Technique

基　　金：973项目资助(6134502-1)

摘　　要：采用高温熔融法制备了不同Er3+掺量的硼硅酸盐玻璃。测量和分析了玻璃样品的光密度和吸收光谱,并用最小二乘法拟合了实验与理论吸收谱线。应用Judd-Ofelt理论计算了光谱参数Ωλ(λ=2,4,6)和Er3+的振子强度,计算了拟合过程中的均方根偏差(δ),并讨论了Er3+浓度对对光密度和Ωλ参数的影响。分析结果表明:当Er2O3含量为21mol%时,玻璃在达到了较高的光密度(D0.53=4.0)的同时,Ω2亦达到最大值。此时玻璃中Er3+所处环境的对称性降低而共价性增强。Er^3＋ -doped borosilicate glass samples doped with different concents of Er^3＋ are prepared by the technique of high-temperature melting. The optical density and absorption spectrum of this glass is measured and analyzed. Measured spectra-line strengths of the transition is compared with the calculated electric dipole spectra-line strengths by least-squares tech- niques, and the J-O intensity parameters Ωλ （ λ = 2,4,6） and oscillator strengths of Er^3＋ are calculated using Judd-Ofelt theory, and the root-mean-square deviation （δ） is calculated. The effects of the Er^3＋ concentration on the above parameters are discussed. The result indicates when the Er^3＋ concentration is 21mol%, optical density at 0.53μm （D0 53μm） is up to 4 and the value of Ω2 is max . At the same time, the ambience of Er^3＋ in glass is changed, the symmetrical characteristic is decreased, and the covalent characteristic is increased.

关 键 词：硼硅酸盐玻璃 稀土 吸收光谱 氧化铒 JUDD-OFELT理论 

分 类 号：TQ171.12[化学工程—玻璃工业]