Tan Hua, Pan Jiahui, Zheng Xiaojia, Fu Xiaoquan, Zhang Yuxun, Liu Yanxing, Huang Qiheng
Dongguan University of Technology, Dongguan 523808, China.
State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
Micromachines (Basel). 2022 May 12;13(5):765. doi: 10.3390/mi13050765.
Based on femtosecond laser glass welding, four different porous structures of welding spots were formed by the manufacturing processes of spatiotemporal beam shaping and alternating high repetition rate transformation. Compared with an ordinary Gaussian beam, the welding spot fabricated by the flattened Gaussian beam had smoother welding edges with little debris, and the bottom of the welding spot pore was flat. Instead of a fixed high repetition rate, periodically alternating high repetition rates were adopted, which induced multiple refractive indices in the welding spot pore. The welding spot pores manufactured by spatiotemporal beam shaping and alternating high repetition rate transformation have a special structure and excellent properties, which correspond to superior functions of porous glass.
基于飞秒激光玻璃焊接，通过时空光束整形和交替高重复频率变换的制造工艺形成了四种不同的焊点多孔结构。与普通高斯光束相比，扁平高斯光束制造的焊点焊接边缘更光滑，几乎没有碎片，焊点孔隙底部平整。采用周期性交替高重复频率而非固定的高重复频率，这在焊点孔隙中诱导出多个折射率。通过时空光束整形和交替高重复频率变换制造的焊点孔隙具有特殊结构和优异性能，这与多孔玻璃的卓越功能相对应。
