Mechanism and research progress of ultrashort pulse laser welding of glass materials

Glass materials are widely used in aerospace,automotive and integrated circuit fields due to a series of excellent physical and chemical properties,but their typical high hard and brittle characteristics cause glass to expand and brittle when heated,and it is difficult to form reliable welding joints.Ultrafast lasers are an ideal heat source for glass welding due to their small thermal effect and the formation of nonlinear absorption.This paper introduces the principle and mechanism of ultrafast laser welding glass materials,analyzes the process characteristics and forming laws of soda-lime glass,silicate glass and quartz glass laser welding in detail,analyzes the forming mechanism of laser welded glass through the simulation of glass welding,and finally points out the challenges and development direction of ultrashort pulse laser welding glass.