论文部分内容阅读
采用溶胶–凝胶燃烧法,制备了钕镱共掺钇铝石榴石(Nd3+/Yb3+:YAG)透明陶瓷纳米粉体,并用热分析、X射线衍射、红外光谱、透射电镜、吸收及荧光光谱等测试方法对其结构、形貌及性能进行分析。结果表明:经900℃煅烧,Nd3+/Yb3+:YAG透明陶瓷的质量损失为49.56%,所得到的Nd3+/Yb3+:YAG纳米粉体结晶好,烧结性好,纯度较高,形状规则,粒径均匀,均在60～100nm之间。在808nm处具有较强的吸收带,对应于Nd离子4I9/2-4F7/2跃迁,有利于对808nm激光二级管泵浦光的吸收。在1064nm处,Nd3+/Yb3+:YAG的发射峰要强于Nd3+:YAG,说明在Nd3+/Yb3+:YAG中,通过[(4F3/2)Nd,(2F7/2)Yb]→[(4I9/2)Nd,(2F5/2)Yb]离子间的交叉弛豫,产生了有效的Yb3+到Nd3+的能量转移,从而实现激光的高效输出。
The Nd3 + / Yb3 +: YAG transparent ceramic nano-powders were prepared by sol-gel combustion method and characterized by thermal analysis, X-ray diffraction, infrared spectroscopy, transmission electron microscopy, absorption and fluorescence spectroscopy Test method to analyze its structure, morphology and performance. The results show that the mass loss of Nd3 + / Yb3 +: YAG transparent ceramic is 49.56% after calcination at 900 ℃. The obtained Nd3 + / Yb3 +: YAG nanocrystalline has good crystallinity, good sinterability, high purity, uniform shape and uniform particle size , Are between 60 ~ 100nm. It has a strong absorption band at 808nm, which corresponds to the 4I9 / 2-4F7 / 2 transition of Nd ions, which is beneficial to the absorption of 808nm laser diode pump light. The emission peak of Nd3 + / Yb3 +: YAG at 1064 nm is stronger than that of Nd3 +: YAG, which indicates that the emission band of Nd3 + / Yb3 +: YAG is enhanced by [(4F3 / 2) Nd, (2F7 / 2) Yb] → [(4I9 / 2) Nd, (2F5 / 2) Yb] ion, resulting in an efficient energy transfer from Yb3 + to Nd3 +, thus achieving high efficiency laser output.