A Study of the Characteristics of Plasma Generated by Infrared Pulse Laser-Induced Fused Silica

When high energy infrared laser pulses are incident on fused silica, the surface of silica is damaged and a laser-induced plasma produced. Based theory fluid mechanics gas dynamics, two-dimensional axisymmetric dynamic model was established to simulate generation process induced by millisecond pulse laser. The results show that temperature central region irradiated highest, first produced in this region. density 1.0 × 104 J/cm2 width 0.2 ms, maximum expansion velocity 17.7 m/s. Under same experimental conditions, simulation experiment good agreement. With an increase width, rate gradually decreases.