Ultra-short Pulse Laser Interaction With Transparent Dielectrics

The study of ultra-short pulse laser interaction with transparent dielectrics has become an international hotspot. The ionization processes of multi-photon ionization and avalanche ionization in laser-induced damage are studied. The changes of avalanche ionization rate and multi-photon ionization rate with the changes of laser intensity are investigated by taking the silica glass as an example. Theoretical analyse the ultra-short pulse laser interaction with transparent dielectrics, and the relation between damage threshold and laser pulse duration and photon energy is studied. Simulate laser ablation of transparent dielectric material, get the results of distribution of the laser energy balance, absorbed energy distribution along the propagation direction of wave, the spatial distribution of energy absorption, changes in the maximum free electron density.