Effect of physical parameters of laser radiation on the process of weld formation in transparent dielectrics

Abstract The article determines the influence of pulse duration, energy density and focusing parameters on the process of formation of a weld of transparent dielectrics. A comparative analysis of laser welding of borosilicate and quartz glass with different pulse durations and energies of picosecond and femtosecond fiber lasers was carried out. Basic regularities of weld shape change depending on pulse duration and energy are obtained. The combination of physical parameters of laser radiation and focusing allows welding along gaps up to 6 μ m.