The high-power green fiber laser adopts the design of all-fiber fundamental frequency plus extracavity frequency doubling, with stable structure and small size. It can realize spatial transmission, and can also provide flexible transmission mode coupled to optical fiber according to customer requirements, and more intelligently match the design of multiple scenarios. It is widely used in metal 3D printing of high-anti alloy materials, photovoltaic material processing, high-anti-metal welding, FPC overlay film cutting, glass-based ink removal and other material precision processing.