Nd:YAG stands for Neodymium-doped Yttrium Aluminum Garnet, a solid-state laser commonly used in various applications. It emits light at a wavelength of 1064 nanometers, making it effective for cutting, welding, and medical procedures. The laser's ability to penetrate deeper into tissues makes it particularly useful in dermatology and ophthalmology. The Nd:YAG laser operates by using neodymium ions as the active medium, which are excited by a flashlamp or laser diode. This type of laser is known for its high efficiency and versatility, allowing it to be used in both industrial and medical fields, including cosmetic treatments and laser surgery.