Er^(3+)∶YVO_4中Er^(3+)的光谱参数计算  

Optical Parameters of Er^(3+) in Er^(3+)∶YVO_4

作　　者：陈英[1] 陈晓波[1] 陈鸾[1] 刘大禾[1] 宋增福[2] 李永良[1] 李崧[1] 曾永志[3] 吴正龙[1] 张春林[4,5] 王亚非[1] 郭敬华[1] 

机构地区：[1]北京师范大学物理系,应用光学北京重点实验室,分析测试中心,北京100875 [2]北京大学物理学院,北京100871 [3]福州大学物理系,福建福州350108 [4]北京物科光电有限公司,北京100080 [5]中国科学院物理所,北京100080

出　　处：《光谱学与光谱分析》2010年第7期1729-1733,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10674019)资助

摘　　要：根据掺杂Er3+(0.5%)的YVO4样品的吸收光谱,用Jubb—Ofelt理论拟合出唯象强度参量Ωλ,并由此计算了激发能级的振子强度、自发辐射跃迁速率、荧光分支比和积分发射截面等光谱参量。并根据这些光学参量,分析了Er3+∶YVO4晶体的应用价值。其中,特别是4I13/2→4I15/2,2H11/2→4I15/2,4S3/2→4I15/2和4F9/2→4I15/2等几个强发光能级具有较大的振子强度(大于10-6)和积分发射截面(大于10-18cm),分别分析了它们的应用前景,因此非常值得关注。并且,本文结果和Capobianco等所报道的Er3+(2.5 mol%)∶YVO4晶体强度参量结果很相近。而且,通过比较掺Er3+钒酸钇晶体和掺Er3+其他晶体的光学性能,可以看出钒酸钇晶体作为激光晶体的优点。最后,还根据Er3+在晶体中的对称性,利用群论讨论了Er3+在YVO4晶场中各能级的劈裂情况。In the present paper the authors firstly measured the absorption spectra of Er^3＋ in the sample Er^3＋： YVO4 （0.5%）, then calculated the intensity parameters are calculated by using the Judd-Ofelt theory. After that the authors dealed with some predicted spectroscopic parameters, such as the oscillator strength, spontaneous radiative transition rate, branching ratio and integrated emission cross section. And Er ： YVO4 crystal application value has been analyzed with the optical parameters. Especially there are large oscillator strengths and large integrated emission cross sections in the transitions of ^4 I13/2→^4 I15/2, ^2 H11/2→ ^4 I15/2, ^4S3/2→^4 I15/2, and ^4F9/2→^4I15/2. So, they are more worth of attention. Moreover, by comparing the Er-doped yttrium vanadate crystal and other Er-doped crystal optical properties, the authors can see the advantages of YVO4 as laser crystal. Finally, the authors discussed the splitting of the energy levels of Er^3＋ in the crystal YVO4 based on the group theory.

关 键 词：Er3+∶YVO4 强度参量Ωλ 能级分裂 不可约表示 

分 类 号：O43[机械工程—光学工程]