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采用光偏转法分别对空气及水中的激光等离子体冲击波信号进行了探测。研究了自由衰减条件下,激光等离子体冲击波波阵面的衰减特性,并讨论了作用激光能量以及介质的物理特性对冲击波波阵面衰减特性的影响。结论表明,采用光偏转法可以有效地探测各种透明流体介质中的激光等离子体冲击波;同种介质中,作用激光能量越大,冲击波衰减越慢;作用激光能量相同,冲击波在波阻抗较小的介质中衰减较慢。
The light deflection method was used to detect the laser plasma shock signal in air and water respectively. The attenuation characteristics of the laser plasma shock wave front were studied under the condition of free attenuation. The influence of the laser energy and the physical properties of the medium on the attenuation characteristics of the shock wave front was also discussed. The results show that laser deflagration can be effectively detected by optical deflecting method in all kinds of transparent fluid medium. In the same medium, the larger the laser energy is, the slower the shock wave decays. The same laser energy, Medium slow decay.