Yb:GdScO_(3)晶体光谱参数计算

Spectral Parameter Computation of Yb∶GdScO_(3) Crystal

采用提拉法生长了质量优良的Yb:GdScO_(3)晶体,对样品的X射线粉末衍射进行了Rietveld精修,给出了晶体计算密度及掺杂浓度。Yb^(3+)的有效分凝系数计算为1.04。室温下测量了其吸收光谱、发射光谱和荧光寿命,首次计算了GdScO_(3)基质中Yb^(3+)的吸收、发射振子强度、谱线强度、跃迁概率、能级寿命和积分发射截面等重要光谱参数,对其激光性能进行了初步评估。结果表明,Yb:GdScO_(3)易于输出1030 nm和1060 nm波段附近的激光,而对于1000 nm附近的激光输出则只有在高粒子数反转情况下才可能实现。

A high quality Yb∶GdScO_(3)crystal was grown by Czochralski method.The X-ray diffraction was refined by Rietveld method,and the calculated crystal density and doping concentration were obtained.The effective segregation coefficient of Yb^(3+)is calculated to be 1.04.Its absorption spectrum,emission spectrum and fluorescence lifetime were measured at room temperature.The absorption,emission oscillator strength,spectral line strength,transition probability,energy level lifetime and integral emission cross section of Yb^(3+)in GdScO_(3)matrix were calculated for the first time.The laser performance is preliminarily evaluated.The results show that Yb∶GdScO_(3)is easy to output laser near 1030 nm and 1060 nm,while the laser output near 1000 nm is only possible under the condition of high population inversion.