[4] Y Zheng, Y F Yang, X Zhao, et al. Research progress on spectral beam combining technology of high-power fiber lasers. Chinese Journal of Lasers, 44, 0201002(2017).
[7] Strecker M, Plötner M, Stutzki F, et al. Highly efficient dualgrating 3channel spectral beam combining of narrowlinewidth monolithic cw Ybdoped fiber amplifiers up to 5.5 kW[C]Proc SPIE 10897, Fiber Lasers XVI: Technology Systems, 2019, 10897: 108970E.