Shen Hong, Tian Chenyun, Wei Xingyu
Opt Lett. 2024 Aug 15;49(16):4497-4500. doi: 10.1364/OL.532096.
Lap welding restricts the connection state of glasses by vertically incident ultrafast laser at the interface to be welded, which cannot meet the increasingly flexible welding needs. In this Letter, glass butt welding is achieved by oblique incidence of an ultrafast laser, expanding the applicability of ultrafast laser glass welding. Furthermore, the propagation path of the laser beam after oblique incidence into a glass is solved based on geometric optics, the dynamic development of the molten pool in a glass is observed through a high-speed camera, and the mechanism of glass butt welding is elucidated. Finally, the influence of laser pulse energy, glass tilt angle, and defocus amount on welding strength is investigated, achieving a maximum shear strength of 11.5 MPa.
搭接焊接通过将超快激光垂直入射到待焊接界面来限制玻璃的连接状态，这无法满足日益灵活的焊接需求。在本信函中，通过超快激光的斜入射实现了玻璃对接焊接，扩大了超快激光玻璃焊接的适用性。此外，基于几何光学求解了斜入射到玻璃中后激光束的传播路径，通过高速相机观察了玻璃中熔池的动态发展，并阐明了玻璃对接焊接的机理。最后，研究了激光脉冲能量、玻璃倾斜角度和离焦量对焊接强度的影响，实现了11.5 MPa的最大剪切强度。
