Basics and Features of High-Power Fiber Laser

The high-power fiber laser is superior to other high-power lasers with a gain medium of solid crystal or gas in all aspects such as beam quality, energy efficiency, space efficiency, stability and reliability, and is getting the major position in laser processing field. Fujikura has grown up high-power fiber laser technologies on the basis of its proprietary optical fiber related technologies, and one of the milestones is described in “special issue on fiber laser” of this Fujikura Technical Review. As an introdction of the issue, this report reviews structural features of high-power fiber lasers and their advantages together with parameters characterizing the advantages.