Experimental study of high-power laser induced shock waves

LIU Li; WANG Sheng-bo; WU Hong-xing; GUO Da-hao; LIAO Pei-yu

To improve the technology of modifying material properties by using laser induced shock waves,the properties of laser shock waves were studied.The piezoelectric waves were measured using a polyvinylidene fluoride(PVDF) piezoelectric gauge of a short rise time and a wide linear response range,together with an oscilloscope.Depending on the piezoelectric waves,laser-induced shock waves were measured.The laser-induced shock waves in the confinement geometry were analyzed and compared to that in the direct ablation regime.In the confined condition,the FWHM of laser-induced shock wave was three times that of laser and the peak pressure was much higher than that in the direct ablation regime.The average propagation velocity of the laser-induced shock wave in stainless steel was 5.72×103m/s.

Corresponding author: WANG Sheng-bo, sbwang@ustc.edu.cn;

1. Institute of High-Power Laser Technology, University of Science and Technology of China, Hefei 230026, China

Received Date: 2006-01-16

Accepted Date: 2006-03-24

Available Online: 2007-04-25

Abstract: To improve the technology of modifying material properties by using laser induced shock waves,the properties of laser shock waves were studied.The piezoelectric waves were measured using a polyvinylidene fluoride(PVDF) piezoelectric gauge of a short rise time and a wide linear response range,together with an oscilloscope.Depending on the piezoelectric waves,laser-induced shock waves were measured.The laser-induced shock waves in the confinement geometry were analyzed and compared to that in the direct ablation regime.In the confined condition,the FWHM of laser-induced shock wave was three times that of laser and the peak pressure was much higher than that in the direct ablation regime.The average propagation velocity of the laser-induced shock wave in stainless steel was 5.72×103m/s.

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Reference (14)

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Experimental study of high-power laser induced shock waves

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