Local structure of Yb3+ ions and X-ray induced defect in Yb-doped silica glass

被引：5
|
作者：
Okazaki, T. [1 ]
Sekiya, E. H. [1 ]
Saito, K. [1 ]
机构：
[1] Toyota Technol Inst, Tempaku Ku, 2-12-1 Hisakata, Nagoya, Aichi 4688511, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2019年 / 58卷 / 01期
关键词：
FIBERS;
D O I：
10.7567/1347-4065/aae89d
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The local structure of Yb3+ ions in Yb-doped silica glass was investigated by extended X-ray absorption fine structure, the Rayleigh scattering and optical absorption measurements. It was found that the Yb coordination number increases from 3 to 4.5 with increasing Yb concentration. Simultaneously, the absorption cross-section of Yb3+ ion decreases and the Rayleigh scattering coefficient increases. These results suggest that local structure observed in Yb2O3 or Yb2Si2O7 crystals appears in high-Yb samples. Furthermore, photodarkening by X-ray irradiation was measured, and the correlation to the local structure change was clarified. (C) 2018 The Japan Society of Applied Physics
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页数：5
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