What is the wavelength of Er:YAG laser?

The Er:YAG laser, which employs a crystal composed of erbium-doped yttrium aluminum garnet, has a wavelength of approximately 2940 nanometers. This specific wavelength is in the infrared region of the electromagnetic spectrum and is particularly valuable in various medical and industrial applications.

The 2940 nm wavelength corresponds to a peak absorption by water, which makes the Er:YAG laser highly effective for procedures involving soft tissues, as water content in tissue leads to efficient absorption of the laser energy. This characteristic allows for precise cutting and ablation with minimal thermal damage to surrounding tissues, making it a preferred choice in cosmetic surgery, dermatology, and dental applications.

In contrast, the other wavelengths mentioned in the options do not represent the Er:YAG laser and are associated with different types of lasers. For instance, the wavelength of 1064 nm is characteristic of the Nd:YAG laser, which has different interactions with biological tissues. Each laser wavelength has unique properties and uses, thus it's crucial to understand which wavelengths correspond to which laser technologies in order to utilize them effectively in their applicable fields.