An Nd:YAG laser is a laser in which the active gain medium is neodymium-doped yttrium aluminum garnet; Nd:Y3Al5O12
Nd:YAG lasers are optically pumped using either a flashlamp or laser diode array. They are one of the most common types of laser, and are used for many different applications. They typically emit light with a wavelength of 1064 nm, but can be frequency doubled (532nm, green) or tripled (266nm, blue). Nd:YAG lasers operate in both pulsed and continuous wave (CW) mode. Pulsed Nd:YAG lasers are typically operated in a Q-switched mode.
For more information read Nd:YAG Laser or Fiber Laser for Micro Welding.