A fiber laser is a type of laser in which the active gain medium is an optical fiber doped with rare-earth elements such as erbium, ytterbium, or neodymium. Fiber lasers generate a high-powered, highly focused beam of light that is transmitted through flexible optical fibers. This technology offers significant advantages, including high efficiency, excellent beam quality, and low maintenance requirements. Fiber lasers are widely used in industrial applications such as cutting, welding, marking, and engraving metals and other materials. Their precision and reliability make them ideal for manufacturing, medical, and scientific uses, and their compact design allows for easy integration into automated systems.