The term “Laser”

The term “Laser“ is an acronym for the description of the laser process: Light Amplification by Stimulated Emission of Radiation. In other words: A beam of light is amplified by supplying a laser-active medium with energy, exciting it and then using already existing radiation to stimulate it to emit radiation itself. This radiation is not always in the visible range, and particularly the laser beams used in materials processing radiate in the infrared and ultraviolet ranges, so that they are not visible.