γ辐照对掺Er硅酸盐玻璃吸收和发光特性的影响

盛于邦; 杨旅云; 栾怀训; 刘自军; 李进延; 戴能利

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

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

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Er3＋特定能级（如2H11/2,4S3/2及4F9/2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.

关键词:

Abstract: 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.

γ辐照对掺Er硅酸盐玻璃吸收和发光特性的影响

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

关键词:

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

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

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