Laserline’s blue high power diode laser series revolutionizes the processing of copper, gold and its alloys in various ways. With approximately 445 nm, these lasers offer the ideal wavelength for the laser processing of highly reflective metals. Multiple times higher absorption allows significantly lower intensities and larger laser spots. Up to 4 kW cw of available laser power supports both – controlled heat conduction welding as well as keyhole welding processes.
https://www.laserline.com/en-int/blue-diode-laser/