[3] Jeong Y,Sahu J,Payne D,et al. Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power[J]. Opt. Express,2004,12(25): 6088-6092.
[4] Li Yongzhong,Qian Liejia,Lu Daquan,et al. Coherent and incoherent combining of fiber array with hexagonal ring distribution [J]. Optics & Laser Technology,2007, 39(5): 957-963.
[5] Chen Zilun,Hou Jing,Zhou Pu,et al. Mutual injection locking and coherent combining of three individual fiber lasers [J]. Optics Communications,2009,282(1): 60-63.
[6] Fotiadi Andrei A,Zakharov Nikita,Antipov Oleg L,et al. All-fiber coherent combining of Er-doped amplifiers through refractive index control in Yb-doped fibers [J]. Opt. Lett.,2009,34(22): 3574-3576.
[7] Madasamy P,Jander D R,Brooks C D,et al. Dual-Grating Spectral Beam Combination of High-Power Fiber Lasers[J]. Selected Topics in Quantum Electronics,IEEE Journal of,2009,15(2): 337-343.
[8] Moti Fridman. Passive phase locking of 25 fiber lasers[J]. Opt.Lett.,2010.
[9] Gao,K,L Xu,et al. Flat-top laser beam generated by coherent beam combining of Gaussian lasers[J]. Chin. Opt. Lett.,2010,8(1): 45-47.