... reduced Euipment:The two types of lasers commonly used are solid-state lasers and gas lasers (especially ruby lasers and Nd:YAG ... , it emits photons and forms the laser beam.[edit]Solid state laserSolid-state lasers operate at wavelengths on the order of 1 micrometer ... light lasting about two milliseconds is emitted by the laser. Disk shaped crystals are growing in popularity in the industry, and ...