Fabrication and laser performance of polycrystal and single crystal Nd:YAG by advanced ceramic processing
Fabrication and laser performance of polycrystal and single crystal Nd:YAG by advanced ceramic processing
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DOI：
10.1016/j.optmat.2005.12.013
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
A. Ikesue;T. Yoda;S. Nakayama;K. Yoshida
中科院分区：
文献类型：
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作者：
A. Ikesue;T. Yoda;S. Nakayama;K. Yoshida
本文报道了通过先进的陶瓷加工技术首次制备出具有近乎完美无孔结构和nd掺杂YAG单晶的nd掺杂YAG多晶陶瓷。无孔Nd:YAG多晶陶瓷的激光转换效率极高，其光学质量可与市售高质量Nd:YAG单晶相媲美。此外，我们还成功地用固相反应法制备了Nd:YAG单晶，使激光振荡成为可能。单晶内部有孔洞时，激光振荡效率很低，而无孔洞Nd:YAG单晶的激光振荡效率略高于有晶界的Nd:YAG多晶陶瓷。由此发现，Nd:YAG陶瓷内部的光学散射主要发生在残余孔隙处，晶界处的散射很少。此外，我们还证实了烧结法制备高浓度Nd:YAG单晶的可能性。
We report the first demonstration of polycrystalline Nd-doped YAG ceramics with almost perfect pore-free structure and Nd-doped YAG single crystal by advanced ceramic processing. The laser conversion efficiency of pore-free polycrystalline Nd:YAG ceramics is extremely high and its optical quality is comparable to that of commercial high quality Nd:YAG single crystal. Moreover, we have succeeded also in fabrication of Nd:YAG single crystal, which enables laser oscillation, by solid-state reaction method. Laser oscillation efficiency was very low when the pores were remained inside single crystal, however the laser oscillation efficiency of pore-free Nd:YAG single crystal was slightly higher than that of polycrystalline Nd:YAG ceramics having grain boundaries. From this fact, it was found that the optical scattering inside the Nd:YAG ceramics occurs mainly at the residual pores and the scattering at the grain boundary is very little. In addition, we confirmed that high concentration Nd:YAG single crystal can be fabricated by sintering method.