Fiber laser

The utility model discloses an optical fiber laser, which comprises a gain optical fiber, the gain optical fiber is coiled into a plurality of optical fiber coils, the plurality of optical fiber coils are coiled into a cylindrical structure, and the diameter of each optical fiber coil in the plurality of optical fiber coils is smaller than or equal to a target diameter. According to the utility model, the technical problem that the fiber laser cannot effectively suppress the mode unstable threshold is solved. 本实用新型公开了一种光纤激光器，其中，上述光纤激光器包括：增益光纤，其中，增益光纤盘绕成多个光纤线圈，多个光纤线圈盘绕成柱形结构，多个光纤线圈中每个光纤线圈的直径小于或者等于目标直径。本实用新型解决了光纤激光器无法有效抑制模式不稳定阈值的技术问题。