高功率掺镱双包层光纤激光是近年来国际上固体激光技术中的一个热点领域 ,它具有光束质量好、结构紧凑、转换效率高等优点 ,在工业加工和国防军事等领域有着广泛的应用前景。最近 ,我们在 5 0W双包层光纤激光研究的基础上 ,通过改进抽运端面处理工艺和优化抽运耦合系统 ,有效地 High-power Ytterbium-doped double-clad fiber laser is a hot area in the field of solid-state laser technology in recent years. It has the advantages of good beam quality, compact structure and high conversion efficiency. It has a wide range of applications in the fields of industrial processing and national defense . Recently, on the basis of the research of 50W double-clad fiber laser, by improving the pumping end surface treatment process and optimizing the pumping coupling system, we effectively