Fig. 1. Schematic diagram of the picosecond laser induced damage experiment setup

Fig. 2. The size of the damaged area changes with the laser’s energy density

Fig. 3. Damage morphography at different energy densities

Fig. 4. Damage morphography at the energy density of 302 J/cm²

Fig. 5. Damage morpography at the energy density of 21.9 J/cm²

Fig. 6. Damage morphography at the energy density of 3.04 J/cm²

Fig. 7. Damage morphography from the pulse accumulation effect at the energy densities of 0.52 J/cm²、1.07 J/cm²

Fig. 8. Variation of the ablation zone size with the number of pulses

Fig. 9. Damage morphology from the pulse accumulation effect