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Article Abstract
In this study, Yb/Al/Ge co-doped silica fiber core glasses with different GeO 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 GeO content on the valence variations of Yb/Yb ions, spectral properties of Yb ions, and radiation resistance of Yb/Al/Ge co-doped silica glasses were systematically studied. The results show that even if the GeO content of the sample is relatively low (0.62 mol%), it can inhibit the generation of Yb ions with slight improvement in the spectral properties of Yb ions in the pristine samples and effectively improve its radiation resistance. Direct evidence confirms that the generation of trapped-electron centers (Yb/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.
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| http://dx.doi.org/10.3390/ma15062235 | DOI Listing |
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