Nd:YAG: A solid-state laser where the laser-active medium is a YAG crystal doped with neodymium. It provides a wavelength of around 1064 nm, high precision, and the option of both pulsed and continuous operation. Nd:YAG is often used for finer details, thinner materials, and the combination of cutting/welding.
Disc laser: A further developed solid-state laser where the laser-active material is a thin disc mounted against a cooling plate. This provides very stable beam quality, high efficiency, and is well suited for automated high-volume production in metal, with narrow cuts and good repeatability.