Development of Micro-welding by Ultra-short Pulsed Laser to Perform High-quality Joint of Glass

为实现超短脉冲激光对玻璃材料的高可靠性微连接，研究了焊接特性及熔区评价。实验研究了超短脉冲激光在玻璃材料中产生的熔融区。激光扫描速度影响玻璃焊接熔区尺寸，而脉冲重复频率直接影响裂纹和微气泡的产生。熔凝区强度与母材基本相当，在低速高重复频率条件下可获得较高的强度。

The welding characteristics and evaluation of molten zone were investigated in order to realize the high reliable micro-joining process of glass material by ultra-short pulsed laser. Molten zones created by the ultra-short pulsed laser in a glass material were experimentally investigated. The laser scanning speed influenced the molten zone size of glass welding, while the pulse repetition rate had the direct influence on the generation of crack and micro bubble. The strength of molten zone was almost equal to the base material, and high strength could be obtained at the low velocity and the high pulse repetition rate condition.