Abstract
A micro laser induced shock wave in a small region was observed by shadowgraph technique. The shock wave was produced on a metal surface when the metal was irradiated by a pulse laser. Titanium and SUS304 was used as the target. The laser used for the irradiation was λ=532nm in wavelength and its irradiation intensity, lo was changed from 630to7690 GW/m2. The flow visualization was carried out by using a laser shadow graphic technique. The shock mach number was calculated from these images. We obtained the shock wave energy conversion coefficient, which is based on Taylor's self-similar analysis. The experimental results showed that the coefficient was 0.08to0.2 for the relatively low irradiation intensity.
