Optical fiber heat dissipation structure and optical fiber laser

The utility model belongs to the technical field of optical fibers, and discloses an optical fiber heat dissipation structure and an optical fiber laser. The optical fiber radiating structure comprises a sealed container and a radiator. The sealed container is filled with purified water, and the sealed container is provided with a penetrating hole for the optical fiber to penetrate through in a sealed mode. The heat radiator is provided with a heat radiation cavity capable of accommodating a cooling medium, the heat radiator is provided with a medium inlet and a medium outlet which are communicated with the heat radiation cavity, the sealed container is at least partially located in the heat radiation cavity, and the cooling medium in the heat radiation cavity is configured to be capable of absorbing heat generated by the optical fiber. According to the optical fiber heat dissipation structure, the sealed container and the heat dissipation device are arranged, the sealed container is filled with the purified