Edited By: www.Bode4.com
Er:YAG lasers are solid-state lasers whose lasing medium is erbium-doped yttrium aluminium garnet (Er:Y3Al5O12). Er:YAG lasers typically emit light with a wavelength of 2940 nm, which is infrared light. Unlike Nd:YAG lasers, the output of an Er:YAG laser is strongly absorbed by water because of atomic resonances. This fact limits the use of this laser in surgery, and in many other laser applications where water is present. Because of this limitation, Er:YAG lasers are far less common than their relatives such as Nd:YAG and Er:glass lasers.
Er:YAG lasers have been used for laser resurfacing of human skin. Example uses include treating acne scarring, deep rhytides, and melasma. In addition to being absorbed by water, the output of Er:YAG lasers is also absorbed by hydroxyapatite, which makes it a good laser for cutting bone as well as soft tissue. Bone surgery applications have been found in oral surgery, dentistry, implant dentistry, and otolaryngology. Er:YAG lasers are also safer for the removal of warts than are carbon dioxide lasers – because human papillomavirus (HPV) DNA is not found in the laser plume.