What are three types of lasers
Mirror galvanometers can be found in laser engravers. These mirrors move very fast to direct the laser's course. A simple rotation of 10 degrees at your head is sufficient to produce 1 1/2 inches of movement at ten inches. It is also used before engraving and cutting laser paths.
Fiber lasers are widely used for engraving purposes. Their wavelength ranges lie between 780nm and 2200nm.