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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10kHz,开启时间为260ns,上升时间为150ns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。
The experiment system of acousto-optic Q-switched fiber laser was built, and the multi-peak of Q-switched pulse was studied. By adjusting the pumping power of the system, the acousto-optic Q-switch repetition rate, turn-on time, rise time and other adjustable parameters, experiments were carried out to find the Q-switched Q-switched pulse with less number of multi-peaks and good shape. Finally, at a pumping power of 8 W, a Q-switching repetition frequency of 10 kHz, an on-time of 260 ns and a rise time of 150 ns, a Q-switched Q pulse output with a slight protrusion was obtained at a laser conversion efficiency of about 23.6%. Experiments successfully reduce the number of multi-peak output pulse waveform, and optimize the Q-pulse output waveform. The analysis of the experimental results provides a way for the acousto-optic Q-switched fiber laser to obtain output smoothing pulses.