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 Er3+ in the sample Er3+∶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 4I13/2→4I15/2, 2H11/2→4I15/2, 4S3/2→4I15/2, 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 Er3+ in the crystal YVO4 based on the group theory.