Effect of microstructure on thermal field distribution of absorption glass with nanosecond laser-irradiated

Stray light absorption glass to improve high-energy laser systems’ service life becomes a meaningful method. The relationship between microstructure of the surface of absorption glass and laser-induced damage is crucial and still not fully understood. This paper investigates the effect of depth and width of V-shaped microstructure surface on the thermal field of absorption glass by establishing an electromagnetic heat coupling model. The graphs that represent individual conditions versus extreme temperature are achieved. The thermal distribution of the depth-to-width ratio in this microstructure which could avoid the higher temperature is mapped.