摘要
对Er3+:GdVO4样品的光谱参数以及Er3+在晶场中能级的分裂情况进行了研究.首先对样品进行了吸收光谱的测量,接着用Judd-Ofelt理论拟合出了Er3+在GdVO4晶体中的强度参量Ωt,并由此计算了跃迁的振子强度、自发辐射跃迁速率、荧光分支比和积分发射截面.通过计算结果可以发现有较多能级之间的跃迁都有大于10-6的振子强度和大于10-18cm的积分发射截面,并且具有较高的荧光分支比,特别是2H11/2→4I15/2,4S3/2→4I15/2,4F9/2→4I15/2和4I13/2→4I15/2等几个强发光能级除了具有较大的振子强度和积分发射截面外还有很好的应用前景,因此也更加值得关注.最后还利用群论讨论了Er3+离子在GdVO4晶场中各能级的分裂情况并对各Stark子能级的Jz混杂情况进行了分析.
Er^3 ＋ ： GdVO4 is a new laser material which is suitable for high-power laser systems. In this paper we firstly measured the absorption spectrums of Er^3＋ in the sample Er^3＋ ： GdVO4, then the intensity parameters were calculated using Judd-Ofelt theory. After that we calculated some predicted spectroscopic parameters, such as the spontaneous radiative transition rate, branching ratio and integrated emission cross section, which were then compared with the data of other common materials. It was found that there are many transitions with large oscillator strength and large integrated emission cross section, especially ^2H11/2 →^4I15/2 ,^4 S3/2 → ^4 I15/2, ^4 F9/2 → ^4I15/2 and ^4 I13/2 → ^4 I15/2, which are useful in solid-state laser and communications fields. Finally, we discuss the splitting of the energy levels of Er^3 ＋ in the crystal GdVO4 through the group theory, and also analyze the intermix of J, in Starks levels.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第10期6090-6097,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10174008)资助的课题~~
关键词
Er3+:GdVO4
吸收光谱
能级分裂
不可约表示
Er^3＋： GdVO4, absorption spectrum, energy levels splitting, irreducible representation
