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在用引上法生长的ＹｂＹＡＧ晶体中，存在一个独特的色心，其吸收带位于３７５ｎｍ和６２５ｎｍ，随着Ｙｂ２Ｏ３掺杂浓度的增加，色心浓度增加。探讨了晶体生长过程中色心形成机理。高强γ射线辐照ＹｂＹＡＧ晶体，诱导大量色心的形成。晶体中的色心对激发态Ｙｂ３＋离子的荧光寿命具有淬灭效应，因此，ＹｂＹＡＧ激光晶体需要经高温退火，消除色心的影响。
In the YbYAG crystal grown by the Cepstral method, there is a unique color center whose absorption band is located at 375 nm and 625 nm, and the color center concentration increases as the Yb2O3 doping concentration increases. The mechanism of color center formation during crystal growth was discussed. High-intensity γ-rays irradiate YbYAG crystals, inducing the formation of a large number of color centers. The color center of the crystal has a quenching effect on the fluorescence lifetime of the excited Yb3 + ion. Therefore, the YbYAG laser crystal needs to be annealed at a high temperature to eliminate the influence of the color center.