Effect of La2O3 on microstructures and laser properties of Nd:YAG ceramics
Effect of La2O3 on microstructures and laser properties of Nd:YAG ceramics
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DOI：
10.1016/j.jallcom.2011.09.038
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发表时间：
2012-01
影响因子：
6.2
通讯作者：
Wenbin Liu;Jiangxu Li;B. Jiang;Di Zhang;Yu-bai Pan
中科院分区：
文献类型：
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作者：
Wenbin Liu;Jiangxu Li;B. Jiang;Di Zhang;Yu-bai Pan
透明1.0at.%以工业α-Al 2 O3、Y2 O3和Nd 2 O3粉末为原料，采用真空烧结技术制备了Nd：YAG陶瓷。研究了La 2 O3添加量（0-1.2wt%）对Nd：YAG陶瓷显微结构和光学性能的影响。结果表明，添加0.4wt%La 2 O3的Nd：YAG陶瓷的光学性能优于未掺杂的Nd：YAG陶瓷的光学性能，具有上级性能。当La_2O_3含量为0.8wt%时，样品在400 ~ 1100 nm范围内的透过率最高。在颗粒中或颗粒之间没有发现孔隙或其他缺陷。但添加过量的La 2 O3（1.2wt%）容易产生沿着晶界和孔隙的残留夹杂物。用半导体激光器泵浦Nd：YAG陶瓷，研究其激光特性。当La_2O_3的最佳添加量为0.8wt%时，Nd：YAG陶瓷的斜率效率和阈值分别为41.1%和2.9W，是所有样品中激光振荡效果最好的。
Transparent 1.0at.% Nd:YAG ceramics were fabricated by vacuum sintering technology using commercial α-Al2O3, Y2O3and Nd2O3powders as raw materials. Influence of La2O3additions (0–1.2wt%) on microstructures and optical properties of Nd:YAG ceramics was investigated. The results indicate that the optical properties of Nd:YAG ceramics with 0.4wt% La2O3are superior than those of undoped-Nd:YAG ceramics. When the amount of La2O3is 0.8wt%, the specimen has the highest transmittance in the region from 400nm to 1100nm. No pores or other defects are found in or between the grains. However, residual inclusions along grain boundaries and pores are easily generated by adding excessive La2O3(1.2wt%). The Nd:YAG ceramics are pumped by a diode laser to study the laser properties. The slope efficiency and threshold of Nd:YAG ceramics with optimum addition of La2O3(0.8wt%) are 41.1% and 2.9W, respectively, which are the best laser oscillation results among all the specimens.