What type of wavelength does Nd:Yag laser operate at?

The Nd:YAG (Neodymium-doped Yttrium Aluminium Garnet) laser operates at a wavelength of 1064 nanometers, which places it in the near-infrared (NIR) spectrum. This particular wavelength is significant due to its ability to penetrate deeper into tissues, making the Nd:YAG laser particularly effective for a variety of surgical and aesthetic applications, including tattoo removal, hair removal, and treating vascular lesions.

In contrast, the other options provided mention different wavelengths and their corresponding classifications. The 810 nm wavelength is typically associated with diode lasers, while the 755 nm wavelength is characteristic of alexandrite lasers. The 694 nm wavelength corresponds to the ruby laser. None of these align with the operational wavelength of the Nd:YAG laser, which is why 1064 nm is the correct answer.