【摘要】 以高纯氧化物商业粉体为原料,采用固相反应和真空烧结技术,制备了高质量的1.3at%Nd:YAG透明陶瓷.研究了室温下Nd:YAG透明陶瓷的显微结构、光谱及激光性能.实验结果表明,Nd:YAG透明陶瓷主要以穿晶方式断裂;平均晶粒尺寸为15μm,且分布均匀;晶粒中和晶界处没有检测到杂质和气孔存在,且成分一致,无偏析现象.退火后样品在激光波长1064nm处的透过率高达82.4%;主吸收峰位于808.6nm处,峰值吸收系数为4.45cm^-1,激光波长1064nm处的吸收系数为0.11cm^-1;主荧光发射峰位于1064nm处,半高宽为0.82nm,荧光寿命为258μs.用LD端面泵浦Nd:YAG陶瓷样品（泵浦源最大输出功率为1000mW）,获得了波长为1064nm的连续激光输出,激光阈值约530mW,斜率效率为23.2%,最大泵浦吸收功率为731mW时,最大输出功率为45mW.更多还原

【Abstract】 High-quality 1.3at% neodymium-doped yttrium aluminum garnet （Nd:YAG） transparent ceramic was fabricated by a solid-state reaction method and vacuum sintering using high-purityα-Al₂O₃, Y₂O₃ and Nd₂O₃ as raw materials with tetraethoxysilane （TEOS） as sintering aid.The microstructure, the spectral property and the laser performance of the prepared Nd:YAG ceramic were studied.It is found that the sample exhibits pore-free structure with average grain size of 15μm.There is no secondary phase in the grain boundary and grain.Transmittance of the sample after annealing reaches 82.4% at the laser wavelength of 1064nm.The highest absorption peak is centered at 808.6nm and the absorption coefficient is 4.45cm^-1.The peak absorption coefficient at laser wavelength of 1064nm is 0.11cm^-1.The FWHM of 1064nm main emission peak is 0.82nm,and the fluorescence lifetime is 258μs. A laser diode （808nm） was used as pump source whose maximium output was 1000mW,and end- pumped laser experiment was demonstrated on 1.3at%Nd:YAG ceramic.The sample for laser testing isφ16mm×2.8mm in dimension,mirror-polished on both sides and without coating.With 731mW of maximum absorbed pump power,laser output of 45mW is obtained with slope efficiency of 23.2%.The laser threshold is 530mW.更多还原