针对激光在中性盐溶液中对靶材的力学效应问题,基于压电加速度传感器测振原理,通过对悬臂梁不锈钢靶材振动测试与分析,得到毫秒级可见波长532nm、红外波长1064nm脉冲激光在中性盐溶液中对不锈钢靶材的冲击力。结果表明:中性盐溶液中的不锈钢靶材在激光作用下受到的冲击力达到10MPa数量级;红外激光对靶材的作用力随溶液中激光传输距离的增大而减小,而绿光激光对靶材的作用力在传输距离20mm内基本不变。

In view of the mechanical effects with the target by laser in neutral solution,the vibration of stainless cantilever were tested and analyzed based on the test mechanism of piezoelectric accelerometer. The impact pressure of the target in NaNO3 solution by pulsed lasers at wavelength of 532nm and 1064nm with millisecond pulse duration were obtained by the experiment. The results show that stainless materials processed in neutral solution are impacted by the laser and the pressure is in order of 10MPa. The mechanical effect of the target with infrared laser is decreased with the distance of laser propagation in neutral solution. However,the effect with green laser is stable in the laser transmission range of 20mm.