Coherent combination of fiber lasers in self-imaging cavity

In this paper, we studied on the principle and technical difficulties of beam coherent combination with three self-imaging cavity, which were Talbot cavity, Self-Fourier cavity and self-imaging cavity of Fourier transform. Finally, we implemented 1×2 fiber lasers coherent combination and 2×2 fiber lasers coherent combination with Self-Fourier cavity, and the coherent output powers reached 122 W and 26 W, respectively.