伽马辐照对掺镱硅酸盐玻璃光学性能的影响

doi:10.3724/SP.J.1077.2012.11588

无机材料学报 ›› 2012, Vol. 27 ›› Issue (8): 860-864.DOI: 10.3724/SP.J.1077.2012.11588

伽马辐照对掺镱硅酸盐玻璃光学性能的影响

盛于邦, 邢瑞先, 栾怀训, 刘自军, 李进延, 戴能利

(华中科技大学武汉光电国家实验室, 光电子科学与工程学院, 武汉430074)

收稿日期:2011-09-18 修回日期:2011-12-03 出版日期:2012-08-20 网络出版日期:2012-07-09
作者简介:盛于邦(1986-), 男, 硕士研究生. E-mail: shengyubang@gmail.com
基金资助:
国家高技术研究发展计划(863计划)(2011AA030201)

Gamma Radiation Effects on the Optical Properties of Yb-doped Silicate Glasses

SHENG Yu-Bang, XING Rui-Xian, LUAN Huai-Xun, LIU Zi-Jun, LI Jin-Yan, DAI Neng-Li

(Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Received:2011-09-18 Revised:2011-12-03 Published:2012-08-20 Online:2012-07-09
About author:SHENG Yu-Bang. E-mail: shengyubang@gmail.com
Supported by:
863 Program (2011AA030201)

摘要/Abstract

摘要： 采用传统的高温熔融法熔制了一系列掺镱硅酸盐玻璃, 并测试了这些样品经总剂量为5 kGy的钴-60伽马射线辐射源辐照前后的吸收谱、荧光谱和上转换发光光谱. 实验结果表明: 辐致暗化效应导致玻璃样品在400 nm附近出现一个非常强的宽吸收带, 其尾端可延伸至近红外区.经辐致损耗谱分析可知, 部分Yb³⁺离子在辐照过程中通过俘获电离自由电子转变成了Yb²⁺离子, 导致掺杂样品的辐致损耗明显比基质材料的要大. 在960 nm LD泵浦下辐照过的样品荧光强度、上转换发光强度及荧光寿命均有所下降, 且在476 nm附近出现了氧缺陷ODC(Ⅱ)的荧光.室温下辐照过的样品在荧光测试过程中温度明显升高并出现漂白现象.

关键词: 掺镱硅酸盐玻璃, 辐致损耗, 价态转变, 色心荧光

Abstract: A series of Yb-doped silicate glasses were prepared by a conventional melting method under normal processing conditions. The effects of gamma-ray (from a 60Co γ source) radiation on the absorption and emission properties of all glass samples were investigated. The radiation exposure leaded to the formation of color centers in glass samples. Such radiation-induced photodarkening caused a strong broad optical absorption band, which had a maximum wavelength centered at around 400 nm and the tail extended into the near infrared region. In addition, a minor part of the Yb³⁺ ions were converted into Yb²⁺ by trapping free electrons during irradiation based on the radiation induced absorption (RIA) spectra. The excitation energy could be transfered from Yb³⁺ ions to radiation-induced defects through cooperative upconversion or multiphoton absorption processes under 960 nm LD pumping. Such energy transfer processes resulted in a decrease of the upper state lifetime of Yb³⁺ ion which was accompanied by an increase in oxygen deficient center ODC(Ⅱ) defect fluorescence at around 476 nm. Photobleaching effect was observed in irradiated Yb-doped glasses during the fluorescence measurement at room temperature.

Key words: Yb-doped silicate glasses, radiation-induced absorption, valence conversion, color center fluorescence

中图分类号:

TQ171

盛于邦, 邢瑞先, 栾怀训, 刘自军, 李进延, 戴能利. 伽马辐照对掺镱硅酸盐玻璃光学性能的影响[J]. 无机材料学报, 2012, 27(8): 860-864.

SHENG Yu-Bang, XING Rui-Xian, LUAN Huai-Xun, LIU Zi-Jun, LI Jin-Yan, DAI Neng-Li. Gamma Radiation Effects on the Optical Properties of Yb-doped Silicate Glasses[J]. Journal of Inorganic Materials, 2012, 27(8): 860-864.

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伽马辐照对掺镱硅酸盐玻璃光学性能的影响

Gamma Radiation Effects on the Optical Properties of Yb-doped Silicate Glasses

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