摘要
测试了Er/Yb∶KY(WO4)2晶体在室温下3个轴Ng,Np,Nm方向上的吸收光谱,分析比较光谱特性,并计算出各能级跃迁的吸收截面,其中沿Np轴方向有最强的吸收和较大的吸收截面,这有利于激光上能级的粒子数堆积,增大跃迁几率,加强荧光输出。由于掺入Yb3+离子,晶体在980 nm附近有很强的吸收和较大的半峰宽。该晶体在980 nm激光泵浦下有上转换绿光和红光,3个晶轴Np,Ng,Nm轴方向的上转换荧光,波峰位置相差甚微,强弱区别明显,且呈现的各向异性,其中Np方向最强。
The anisotropy absorption spectroscopy of crystal for 3-axis Nm,Ng,Np were conducted at room temperature.The characteristics of spectroscopy were analyzed and compared.The energy level transition of the absorption cross-sections was calculated.The strongest absorption and biggest absorption cross section parallel to the Np principal axis,which increases the number of accumulation for particles,the transition probability and the fluorescence output.The Yb^3＋-doped leads to a strong absorption and large half width near 980 nm.Under 980 nm LD excitation,the up-conversion green and red luminescence was achieved.There is little difference in peak for the up-conversion luminescence of 3-axis Nm,Ng,Np,in which Np is the strongest in the three axes.
出处
《应用光学》
CAS
CSCD
北大核心
2010年第4期553-556,共4页
Journal of Applied Optics
基金
福建省自然科学基金(2009J05129)
