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采用氙灯泵浦，Ｃｒ４＋ＹＡＧ被动调Ｑ，实现了自倍频晶体ＮＹＡＢ调Ｑ激光运转，测量了Ｃｒ４＋ＹＡＧ不同小信号透过率及不同泵浦能量下绿激光单脉冲的输出能量、脉冲宽度、重复率，给出了描述ＮＹＡＢ晶体Ｃｒ４＋ＹＡＧ调Ｑ工作原理的耦合波方程组，数值求解该方程组所得的理论结果与实验值相符。
Using xenon lamp pump, Cr4 + YAG was passively Q-switched to realize NYAB Q-switched laser operating at frequency doubling crystal. The output energy, pulse width and repetition rate of green laser pulse with different small signal transmittances and different pump energies of Cr4 + YAG were measured. The coupled wave equation describing the working principle of Cr4 + YAG in NYAB crystal is given. The theoretical results obtained by numerical solution of the system are in good agreement with the experimental ones.