搭建了以布儒斯特角切割LiNbO3晶体作为电光调Q元件的Cr,Tm,Ho:YAG激光器，测量了静态时腔内LiNbO3晶体的放置角度对激光器输出能量以及偏振特性的影响。研究发现，当LiNbO3晶体以布儒斯特角放置时，Cr,Tm,Ho:YAG激光器效率最高，输出激光的p分量最大，线偏振特性最好，这对电光调Q是有利的。电光调Q时，测量了不同抽运电压下的输出能量、脉冲宽度及脉冲波形，当重复频率为2 Hz时、脉冲能量为25 mJ，最小脉宽达265 ns，脉冲峰值功率达94.3 kW，脉冲波形呈光滑的近高斯分布。

Cr,Tm,Ho:YAG laser system based on Q switching of LiNbO3 with Brewster angle cut ends is developed. The influence of the angle by which the LiNbO3 crystal is placed on the output energy and polarization properties at free running regime is measured. The experimental results indicate that when the LiNbO3 crystal is placed in the Brewster angle, the laser will achieve the highest efficiency. Furthermore, the output beam has the largest p component and the best linear polarization properties, which are beneficial to the Q switching of Cr,Tm,Ho:YAG laser. The output energy, pulse width and pulse profile of Cr,Tm,Ho:YAG laser at various lamp voltages at Q switching regime are investigated. The maximum pulse energy of 25 mJ and the minimum pulse width of 265 ns at the repetition rate of 2 Hz are achieved, and the peak power is up to 94.3 kW. The pulse profile presents nearly smooth Gaussian distribution.