铒离子在钨酸锌晶体中的光谱性质

Spectroscopic properties of Er^(3+) ions in ZnWO_4: Er crystal

本文测量并分析了ZnWO_4∶Er晶体的吸收光谱、激发光谱和荧光光谱,发现Er^(3+)离子与基质晶格之间存在能量传递效应。用Judd-Ofelt理论计算了Er^(3+)离子的强度参数Ω_λ以及吸收和辐射跃迁的振子强度,并由此计算出激光能级辐射跃迁几率、辐射寿命、积分发射截面及荧光分支比等光谱参数。讨论了ZnWO_4∶Er晶体几个主要通道实现激光输出的可能性。

The spectra of absorption, excitation and emission of ZnWO4 : Er crystal were measured and studied. There is an energy transfer process between Er3+ ion and the host lattice. Intensity parameters Ωλ of Er3+ in ZnWO4:Er crystal were calculated based on Judd-Ofelt theory. The oscillator strength, spontaneous radiative transition rate, radiative lifetime, integrated emission cross section and branching ratio were calculated and discussed. The authors believe that the crystal has the potential usage as a lasing material.