【摘要】 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。更多还原

【Abstract】 In unannealing Yb∶YAG crystals, the absorption peak positions of the color center were located at the wavelengths of 375 nm and 625 nm, and its concentration was increased with doping concentration of Yb 2O 3. The formation mechanism of the color centers was discussed. Large quantity of color centers were produced in Yb∶YAG crystal under γ irradiation. In order to improve the fluorescence lifetime of Yb 3+ , the color centers should be eliminated.更多还原