研究了调Q激光器中微秒量级的长脉冲杂光对纳秒量级的主脉冲激光诱导冲击波的影响。通过调节调Q晶体的半波电压来改变晶体漏光和放大自发辐射的能量(长脉冲杂光)，同时保持抽运功率不变，利用压电传感器聚偏氟乙烯(PVDF)测量了主脉冲激光诱导的冲击波。研究结果显示，随着漏光和放大自发辐射能量的增加，主脉冲激光能量下降，脉冲宽度增宽，导致主脉冲激光功率密度下降，主脉冲激光诱导的冲击波峰值压力下降；同时材料表面被烧蚀得越厉害，当激光总能量为6.5 J，长脉冲杂光能量为2280 mJ时，铝箔被完全烧蚀。根据试验结果对激光诱导的峰值压力公式进行了修正，修正结果适合于长脉冲杂光存在时主脉冲激光诱导冲击波峰值压力的计算。

The effects of the microsecond pulse-width stray light on the shock wave induced by the nanosecond pulse-width of master laser are studied. By adjusting the half-wave voltage loaded on the Q-crystal, the energy of the stray light can be changed. Meanwhile, the shock wave induced by the master laser would be measured by polyvinylidene fluoride (PVDF) under the condition of the unchanged pump power. The result indicates that with the increase of the energy of the stray light, the energy of the master laser decreases and the pulse width of it increases, so the power density of the master laser and the peak pressure induced by the master laser would decrease; in addition, when the whole laser energy is 6.5 J and the energy of the stray light is 2280 mJ, the aluminium foil is ablated thoroughly. According to the experimental result, the formula of the peak pressure induced by the laser has been revised, which can be applicable to the computation of the peak pressure induced by the master laser under the condition of the stray light.