Fig. 1. Schematic diagram of fatigue effect of several materials

Fig. 2. Influence of wavelength on fatigue effect under ultraviolet condition

Fig. 3. Evolution of fatigue effect at 10 Hz for silica surface and bulk

Fig. 4. Frequency effect on the laser damage probability after 10 subsequent shots

Fig. 5. Relationship between incident energy and the number of pulses before damage at various pump pulse durations

Fig. 6. Fatigue effects at different wavelengths

Fig. 7. Relation diagram of the number of pulses to induce damage in materials at different laser fluence

Fig. 8. Relaxation of induced absorption in fused silica

Fig. 9. Relaxation test of fatigue effect

Fig. 10. Damage micromorphologies of HfO₂/SiO₂ high reflection coatings at 532 nm

Fig. 11. Absorption coefficient of fused silica increases with the shots

Fig. 12. In the fixed electric field E, electron density and temperature snapshots of the irradiated regions subject to one pulse N = 1 and few pulses N = 3 irradiation. The electron density is normalized to the critical value N_cr

Fig. 13. Number of several types of defects in fused silica increases with the increase of laser excitation times

Fig. 14. Evolution in the distribution of rings in v-SiO₂ after 800 times irradiation