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Er 3+ -doped SiO 2 glasses with or without BaO were fabricated by containerless processing. Scanning electron microscope observations and the scan profiles of electron-probe microanalysis demonstrated that the Ba-silicate glass was homogeneous and no aggregation of Er 3+ ions occurred. The infrared fluorescence at around 1.55μm from Er 3+ in the Ba-silicate glass excited...
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