The Investigation Of Laser-Induced Plasma Shock Wave In Different Media

The laser-induced plasma shock waves propagation in gas, liquid and solid are systemically investigated in theory. By means of a new method based on a fiber-coupling optical beam deflection technique, a detailed experimental study has been made to clarify the characteristics of shock waves in different media. And it is the first time that the shock waves in (C2H4)n be detected by this method. Comparison of others techniques, this equipment is simple, effective and easy to adjust.Studied the essential theory of shock waves, the temporal and spatial variation of some important parameters on the shock front are obtained by analyzing the results of experiments. And the influence of the laser energy and the media are investigated by experiment. The experimental results reveal that shock waves, in the same medium, attenuate more slowly with the increase of laser energy; and if laser energy is equivalent, shock waves in air attenuate more slowly while shock waves in (C2H4)n attenuated faster.Then by combination with other literature's report, we get the same results. Therefore, the method based on a fiber-coupling optical beam deflection technique offers new possibility for study of the temporal and spatial development of shock front in many transparent media. Besides, these research results will provide the theoretical and experimental reference to laser processing, laser medicine and other corresponding fields.