γ辐照对掺Er硅酸盐玻璃吸收和发光特性的影响  

Gamma radiation effects on absorption and emission properties of erbium-doped silicate glasses

作　　者：盛于邦[1] 杨旅云[1] 栾怀训[1] 刘自军[1] 李进延[1] 戴能利[1] 

机构地区：[1]华中科技大学光电子科学与工程学院、武汉光电国家实验室(筹),武汉430074

出　　处：《物理学报》2012年第11期401-406,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2011AA030201)资助的课题~~

摘　　要：用传统的高温熔融法熔制了一系列掺Er硅酸盐玻璃,并测试了这些样品经5 kGyγ射线辐照前后紫外至近红外的吸收和荧光光谱.实验结果表明,辐致暗化效应使得玻璃材料中形成了大量色心,导致在400 nm附近出现强吸收带,其尾端延伸至近红外区.辐照产生的新能带增加了基质与Er^(3+)特定能级(如~2H_(11/2),~4S_(3/2)及~4F_(9/2)等)之间的能量传递,从而使辐照后的样品荧光寿命减小,且在相同激发条件下荧光强度下降.室温下辐照样品在荧光测试过程中出现了漂白现象.A series of Er-doped silicate glasses is prepared by a conventional melting method under normal processing conditions,and the effects of gamma-ray radiation on absorption and emission properties of all samples are investigated.The radiation-induced darkening causes a strong broad optical absorption band that has a maximum around 400 nm and extends to the near infrared region.The point defects generated in the silicate matrix by irradiation around the Er3＋ ion favor the activation of non-radiative relaxation channels thus modifying the photoluminescence quantum efficiency from specific excited levels,such as those emitting at 520 and 650 nm. Photobleaching effects are observed in Er-doped silicate glasses pumped by 980 nm LD at room temperature.

关 键 词：掺Er硅酸盐玻璃 Γ辐照 辐致损耗 荧光寿命 

分 类 号：O482.31[理学—固体物理]