高功率光纤激光器在工业加工、材料处理等领域有着诸多的应用,得到国内外研究机构的广泛关注。半导体激光器(LD)抽运结构简单、成本低廉、效率较高,国内外相关单位纷纷开展了相关研究。国际上,美国Coherent公司于2014年报道了输出功率为3 k W的空间结构光纤激光器,国内天津大学实现了2.5 k W的全光 High-power fiber lasers have many applications in the fields of industrial processing and material processing, and have drawn wide attention from domestic and foreign research institutions. Semiconductor laser (LD) pump structure is simple, low cost, high efficiency, relevant units at home and abroad have carried out related research. Internationally, the United States Coherent Company reported in 2014 that the output power of 3 k W space structure fiber laser, the domestic Tianjin University to achieve a 2.5 k W full light