Effects of Sintering Aids on the Transparency and Conversion Efficiency of Cr4+ Ions in Cr: YAG Transparent Ceramics |
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| Authors: | Tianyuan Zhou Le Zhang Hao Yang Xuebin Qiao Peng Liu Dingyuan Tang Jian Zhang |
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| Affiliation: | Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, China |
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| Abstract: | Tetravalent chromium‐doped Y3Al5O12 ceramics were fabricated by solid‐state reactive sintering method using high‐purity Y2O3, α‐ Al2O3, and Cr2O3 powders as the starting materials. CaO and MgO were co‐doped as the sintering aids. The effects of TEOS and divalent dopants (CaO and MgO) on the optical qualities, the conversion efficiency of Cr4+ ions, and the microstructure evolutions of 0.1 at.% Cr4+: YAG ceramics were investigated. Fully dense, dark brown colored Cr4+: YAG ceramics with an average grain size of 3.1 μm were achieved. The in‐line transmittance of the as‐prepared ceramic at 2000 nm was 85.3% (4 mm thick), and the absorption coefficient at 1030 nm (the characteristic absorption peak of Cr4+ ions) was as high as 3.7 cm?1, which was higher than that of corresponding single crystals fabricated by Czochralski method. |
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