搭建了两台高功率、低量子损耗的1018 nm短波长掺镱光纤激光器，进行了全光纤结构下两路光纤激光器的相干合成实验。获得了功率为55 W、合成效率为90.2%的相干输出，这是当前严格单模1018 nm光纤激光器的最高功率水平。同时，验证了Michelson腔自组织相干合成技术能够实现光纤激光器的高功率单模输出。

A pair of fiber lasers with high output power and low quantumdefect at 1018 nm was demonstrated. These two 1018 nm fiber lasers were used as the source of Michelson cavity to show experimentally that a coherent beam combination of two Ybdoped doublecladding fiber lasers using allfiber Michelson cavity technique was achieved. We obtained an output power of 55 W with a coherent combination efficiency of 90.2%, which is the highest output power that singlemode 1018 nm fiber lasers have obtained so far. Moreover, we proved that coherent beam combination by using Michelson cavity can achieve high power singlemode output of fiber laser.