A phase-locking methold of two individual fiber lasers based on a beam splitter with reflectivity of 50% at 45° is proposed and the phase-locking principle is analyzed in detail. Phase-locking of two individual double clad fiber lasers is experimentally demonstrated

360mW output power is achieved with the power combining efficiency is about 73%

and the on-axis power intensity is greatly enhanced. The phase-locking approach is simple and no power-limitation optical components were utilized

the output power can be further up scaled and it is one of the most promising phase-locking technologies in high-power fiber laser coherent combination field.