Which laser emits light at a wavelength of 1064 nm?

The laser that emits light at a wavelength of 1064 nm is the Nd:YAG laser. Nd:YAG stands for neodymium-doped yttrium aluminum garnet, which is a solid-state laser widely used in various applications, including medical, industrial, and aesthetic procedures. The specific wavelength of 1064 nm places it in the near-infrared part of the electromagnetic spectrum, making it effective for a range of treatments, such as laser hair removal, tattoo removal, and soft tissue surgeries.

The Nd:YAG laser's wavelength is particularly significant because it allows for deeper tissue penetration while minimizing damage to the surrounding skin. This makes it highly effective for applications that require precision and minimal invasiveness.

Other lasers listed, while also used in various applications, emit light at different wavelengths. For instance, the Er:YAG laser emits around 2940 nm, which is more suitable for ablative skin procedures, whereas the CO2 laser operates at approximately 10600 nm, targeting water in tissues. Diode lasers have variable wavelengths depending on the specific type but typically range from about 800 nm to 980 nm. Therefore, the unique wavelength of 1064 nm clearly identifies the Nd:YAG laser among the choices provided.