Analysis of the thermal effects of different material beam combiner mirror in high-energy laser system
A theoretical model of the thermal simulation was established to study the problem of temperature rise and thermal deformation of the beam combiner mirror in the optical path of a high-energy laser system caused by strong laser radiation.The temperature rise and thermal deformation of the beam combiner mirror with silicon,silicon carbide,quartz glass,and glass-ceramics as substrate materials were analyzed by finite-element analysis software under different laser power irradiation.At the same time,the temperature rise and thermal deformation of the beam combiner mirror with quartz glass and glass-ceramics as substrate materials under extreme conditions were simulated and analyzed.The results show that at 22 ℃,after 10 s of 30 kW single-beam laser irradiation,the temperature of silicon carbide is the lowest at 23.718 ℃ among the four substrate materials,and the thermal deformation of glass-ceramics is the smallest at 0.00115 μm.The thermal deformation of glass-ceramics is 0.000399 μm when irradiated by a six-beam laser with a total power of 30 kW,while the thermal deformation of quartz glass is 18.8 times higher than that of glass-ceramics at the same six-beam.Under extreme conditions,the substrate material with the smallest thermal deformation is also glass-ceramics.Therefore,among the four substrate materials,glass-ceramics is the most suitable as substrate material for the beam combiner mirror in the high-energy laser system.The research results have certain practical reference values for the design of high-energy laser systems.
国家科技期刊平台
NSTL
万方数据
