Recent applications of Additive Manufacturing (AM) pose new challenges that are difficult to meet with the commonly used Infrared (IR) laser, but instead could be well addressed by blue lasers. Indeed, while high-power IR lasers have found extensive usage in materials processing, switching to blue lasers would improve the processing quality and efficiency of some materials that are finding increasing importance in industrial applications, such as copper, gold and aluminum, because of their higher absorption in the blue wavelengths than in the IR region. This also improves the energy consumption since blue laser diodes show an higher Wall Plug Efficiency (WPE) than IR fiber lasers.