Fiber laser

The invention provides an optical fiber laser, and the laser comprises a heat conduction part which is provided with a first surface and a second surface opposite to the first surface; the optical fiber groove is formed in the first surface, and optical fibers are contained in the optical fiber groove; the plurality of first soaking plates are arranged on the second surface at intervals; the plurality of fins are distributed on the plurality of first vapor chambers, and a plurality of fins are arranged on each first vapor chamber at intervals; the first surface and the plurality of first soaking plates are provided with a plurality of component installation positions, and each component installation position is fixedly provided with a component assembly. According to the optical fiber laser with the structure, the heat dissipation area is increased while the overall structure size is not increased; meanwhile, the installation positions of the components are dispersed, so that a heat generation source is forci