A solid-state laser is a type of laser that uses a solid material as its gain medium, typically a crystal or glass doped with ions. These ions, such as neodymium or yttrium, absorb energy from an external source, like a flashlamp or diode, and then release it as coherent light when stimulated. Solid-state lasers are known for their efficiency and durability. These lasers are commonly used in various applications, including medical procedures, industrial cutting, and scientific research. Their compact size and ability to produce high-quality beams make them versatile tools in both commercial and laboratory settings.