Blue diode laser designs with kW powers are advancing in industrial processing applications, including cutting, welding and foil joining of copper and other high-reflectance materials.
Photonics and laser technologies are more important than ever in modern industrial manufacturing, offering highly powerful, flexible, non-contact, reliable operation. Diode lasers in particular are evolving in many critical manufacturing processes, including etching, hardening, brazing, cladding, marking and welding of metals and ceramics, and joining of components in everything from electronics to aircraft engines.
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https://www.osa-opn.org/home/articles/volume_31/october_2020/features/high-powered_diode_lasers—new_bright_and_blue/