Fiber lasers are one class of solid-state lasers in which the gain medium is an opticalfiber. Fiber lasers have been a key technology in the area of solid-state lasers, since the first proposal of using an optical fiber as a mode selector for lasers .
Fiber lasers are compact compared to solid-state or gas lasers of comparable power, because the fiber can be bent and coiled,
The fiber laser is a variation on the standard solid-state laser, with the medium being a clad fiber rather than a rod, a slab, or a disk
