搭建了声光调Q脉冲光纤激光器实验系统，研究了输出的调Q脉冲多峰现象。通过调节系统的抽运功率、声光Q开关的重复频率、开启时间、上升时间等可调参数进行实验，寻找多峰个数少、形状好的调Q脉冲。最终在抽运功率为8 W，Q开关重复频率为10 kHz，开启时间为260 ns，上升时间为150 ns时，得到一个前沿有稍微突起的调Q脉冲输出，此时激光转换效率约为23.6%。实验成功地减少了输出脉冲波形多峰的个数，优化了调Q脉冲的输出波形。对实验结果进行的分析为声光调Q光纤激光器获取输出平滑脉冲提供了方法。

An acousto-optic Q-switched fiber laser experimental system has been established, and the multi-peak phenomenon of the output Q-switched pulse has been analyzed. In order to find the Q-switched pulse with less multi-peak number and better shape, we adjust the controllable parameters like the pump power of system, the repetition rate of acousto-optic Q-switch, opening time and rise time. At last, when the pump power is 8 W, repetition frequency of Q-switch is 10 kHz, opening time is 260 ns, and rise time is 150 ns, we have got a Q-switched output pulse with a slightly protuberance in the front, the conversion rate of laser is about 23.6% at the moment. The multi-peak number of output pulse is reduced successfully in the experiment, and the output waveform of Q-switched pulse is optimized. The analysis of the experiment result provides methods for outputting smooth pulse of acousto-optic Q-switched fiber laser.