Manufacturing of Porous Glass by Femtosecond Laser Welding

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.

Automated summary

This study utilizes femtosecond laser glass welding technology to form four different porous structures of welding spots through specific manufacturing processes. The welding spot fabricated by the flattened Gaussian beam exhibits smooth edges and a flat pore bottom. The welding spot manufactured with alternating high repetition rates introduces multiple refractive indices.