2026-10-13T09:03:27Z https://www.scidb.cn/oai

10.57760/sciencedb.02246 2022-08-17T09:03:06Z

2022-08-17 Influence of GeO2 Content on the Spectral and Radiation-Resistant Properties of Yb/Al/Ge Co-Doped Silica Fiber Core Glasses doi:10.57760/sciencedb.02246 en In this study, Yb/Al/Ge co-doped silica fiber core glasses with different GeO2 contents (0-6.03 mol%) were prepared using the sol-gel method combined with high-temperature sintering. The absorption, fluorescence, radiation-induced absorption, continuous-wave electron paramagnetic resonance spectra, and fluorescence decay curves were recorded and analyzed systematically before and after X-ray irradiation. The effects of GeO2 content on the valence variations of Yb3+/Yb2+ ions, spectral properties of Yb3+ ions, and radiation resistance of Yb/Al/Ge co-doped silica glasses were systematically studied. The results show that even if the GeO2 content of the sample is relatively low (0.62 mol%), it can inhibit the generation of Yb2+ ions with slight improvement in the spectral properties of Yb3+ ions in the pristine samples and effectively improve its radiation resistance. Direct evidence confirms that the generation of trapped-electron centers (Yb2+/Si-E'/Al-E') and trapped-hole centers (Al-OHC) was effectively inhibited by Ge co-doping. This study provides a theoretical reference for the development of high-performance, radiation-r esistant Yb-doped silica fibers. Yb-doped silica glass; anti-darkening; color center; radiation resistance Yiming Zhu Yan Jiao Yue Cheng Chongyun Shao Chunlei Yu Ye Dai Lili Hu PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset http://www.doi.org/10.3390/ma15062235 Science Data Bank