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从理论和实验两个方面研究了ＬＤ泵浦的Ｃｒ４＋ＹＡＧ被动调ＱＮｄ３＋ＹＡＧ激光器，在考虑激活介质能级精细结构及激活介质有限下能级寿命的情况下，推导了连续泵浦的被动调Ｑ激光器输出脉冲重复率的解析表达式；测量了不同实验条件下的脉冲能量、脉冲宽度和脉冲重复率，并与理论结果进行了比较，理论结果与实验结果大致相符。
The LD-pumped Cr4 + YAG passive QNd3 + YAG laser was studied both theoretically and experimentally. Considering the fine structure of the active medium and the limited lifetime of the active medium, the output of the continuously pumped passive Q-switched laser The analytical expression of the pulse repetition rate is obtained. The pulse energy, pulse width and pulse repetition rate are measured under different experimental conditions. The theoretical results are compared with the theoretical results. The theoretical results are in good agreement with the experimental results.