Spectral properties and structure of transparent glass-ceramics based on Fe:MgAl₂O₄ and Fe:ZnAl₂O₄ crystals

Nanocrystalline Yb:YAG-Doped Silica Glass with Good Transmittance and Significant Spectral Performance Enhancements

“…Therefore, direct methods such as advanced high-resolution As shown in Figure 3b, the Raman spectra of the YAS glass were considered a typical glass vibrational structure, while the Raman spectra of the YABS glass were considered a vibrational structure that might contain YAG nanocrystals. The Raman vibration peaks of the YABS glass at 217, 393, and 792 cm −1 were considered to correlate with each other, and were very similar to the Raman vibrational peaks of YAG crystals reported in prior literature [22,[26][27][28][29][30]. In general, the vibrations at 483 and 603 cm −1 were attributed to structural defects in the planar quaternary and ternary rings in the silica glass [16,17].…”

“…The Yb:YAG nanocrystals with a low-content homogeneous distribution and small crystal sizes were crystallized directly into the silica glass network without post-annealing treatment, thus making this a novel study. In contrast with conventional microcrystalline glass with high scattering losses, the Yb:YAG-nanocrystal-doped silica glass had excellent optical transmittance and superior spectral properties [22]. In comparison with Yb 3+ -doped silica glass without nanocrystals, the Yb:YAG nanocrystal-doped silica had a significant increase in the emission cross-section at 1030 nm and the absorption cross-section at 975 nm, without any changes in the silica glass spectral pattern of the Yb 3+ ions.…”