Cd_3Al_2Si_3O_(12)玻璃中的Er^(3+)的光学跃迁  

Optical Transitions of Er~ 3 + in Cd_3A1_2Si_3O_12 Glass

作　　者：黄立辉[1] 刘行仁[1] 徐迈[2] 

机构地区：[1]中国科学院激发态物理开放研究实验室,吉林长春130021 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130021

出　　处：《发光学报》2001年第4期362-366,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金资助项目(19774056)

摘　　要：徐 迈　中国科学院长春光学精密机械与物理研究所，吉林长春１３００２１摘要：根据Ｊｕｄｄ－Ｏｆｅｌｔ理论，利用镉铝硅酸盐玻璃中Ｅｒ３＋的吸收光谱，计算了实验与理论振子强度，用最小二乘法拟合实验与理论振子强度得到了三个Ｊ－Ｏ强度参数ａ２，ｏ４，ａ６。并由此计算了ＥＪ”在不同能级之间的自发辐射系数Ａ、辐射寿命ｒ、荧光分支比β以及积分发射截面Σ。根据这些参数分析认为掺饵镉铝硅酸盐玻璃可能实现近红外激光输出。Er-doped glasses have attracted much research interests due to their application in the area of optical communications, such as fiber amplifiers and lasers, and infrared solid-state lasers. To account for the optical absorption and in turn radiative properties of excited states, the Judd-Ofelt theory has been suc- cessfully applied to most of the lanthanide ions. In this paper, the experimental and theoretical oscillator strengths of some levels of Er3+ ion in Cd3Al2Si3O12 glass(CAS glass in brief) were calculated using the absorption spectra and Judd-Ofelt theory. The root-mean-square deviation is only 3.30×10-7. This result indicates that the theory is in well accord with the experiment results. Based on a least-square fit between experimental and theoretical oscillator strengths, the intensity parameters were determined. The results are Ω2=6.42×10-20cm2;Ω4= 1.53×10-20cm2;Ω6=0.69×10-20cm2. Then the radiative transition proba- bility A,radiative lifetime r, branching ratio βand integrated emission cross-sections of radiative transitions of Er3 + in this glass at room temperature were calculated. According to the large integrated emission cross- emission (1.402×10-8cm) and the long lifetime(8.062ms) of the transition of 4I13/2→4I15/2 of Er3+ in CAS glass, it can be concluded 1.534μm laser oscillation of Er-doped CAS glass is possible to be demon- strated. In addition, this glass has several advantages, such as easy-made, scale-varied, easy-fibered and ad- justable host composition along with their high chemical durability and thermal stability. Therefore, Er- doped CAS glass is a potential near infrared solid-state laser material.

关 键 词：ER^3+ 硅酸盐玻璃 吸收光谱 J-O理论 Cd3Al2SiO12 饵离子 镉铝硅酸盐 光学跃迁 

分 类 号：TQ171.718[化学工程—玻璃工业] O482.31[化学工程—硅酸盐工业]