近年来 ,由于包层抽运技术的应用 ,光纤激光器的能量转换效率和输出功率都有了质的飞跃。连续输出功率高达几十瓦、乃至几百瓦的双包层光纤激光器已经问世。然而 ,在这些高功率的光纤激光器中一般仍采用二色镜等传统的体器件构成谐振腔 ,未能实现全光纤化 ,这不仅极大地限制了 In recent years, due to the application of cladding pumping technology, the energy conversion efficiency and the output power of fiber lasers have made qualitative leaps. Continuous output power of up to tens of watts, and even hundreds of watts double-clad fiber laser has come out. However, in these high-power fiber lasers, traditional body devices, such as dichroic mirrors, are still generally used to form the resonant cavity, failing to achieve full fiberization, which not only greatly limits