ND YAG Lasers
Yttrium aluminum garnet lasers, also referred to as "Nd:YAG lasers" or "YAG lasers," are solid state lasers that use neodymium-doped YAG crystals as their lasing mediums. Nd: YAG lasers are available in constant and pulsing configurations and are generally used for such purposes as laser marking, cutting, and welding. Other common applications of Nd:YAG lasers are found in ophthalmology, cosmetic medicine, manufacturing, and fluid dynamics.
Lasers are demarcated according to the lasing media that they employ. Solid-state lasers like neodymium-yttrium aluminum garnet lasers have lasing material distributed in a solid state. Using a flashlamp or laser diodes, Nd: YAG lasers are pumped optically.
Exposure to ND YAG lasers can cause severe damage. Lasers are divided into six classes, according to their power output: Class I, Class I.A, Class II, Class IIIA, Class IIIB, and Class IV. Class IV systems contain the most dangerous lasers and require a master switch that, when disabled, prohibits all but authorized personnel from operating the laser. Many safety controls may be instituted into ND YAG laser systems, including access restriction to the lasing area, eye protection, area controls, barriers, shrouds, education, and training.