Which type of laser has an active medium of Nd:YAG?

The type of laser that has an active medium of Nd:YAG is a solid-state laser. Nd:YAG stands for neodymium-doped yttrium aluminum garnet, which is a crystalline solid that serves as the laser's active medium. In a solid-state laser, the gain medium is solid, and it is typically doped with rare earth ions that can produce laser light when stimulated.

Solid-state lasers like Nd:YAG are widely used for their efficiency and ability to produce high-energy outputs with good beam quality. The Nd:YAG laser operates by exciting neodymium ions within the crystal lattice of the yttrium aluminum garnet, leading to stimulated emission of light.

Other types of lasers, such as gas lasers, use gaseous media (like CO2 lasers), while liquid lasers use dye solutions and diode lasers use semiconductor materials. Each laser type has unique properties and applications, making the solid-state approach with Nd:YAG distinct and significant in various fields, including medical, industrial, and scientific applications.