[1] DOMINIC V,MacCORMACK S,WAARTS R,et al.110W fibre laser[J].Electron Lett,1999,35(14):1158-1160.
[2] LIMPERT J,LIEM A,ZELLMER H,et al.500W continuous-wave fibre laser with excellent beam quality[J].Electron Lett,2003,39(8):645-647.
[3] LI Ch,YAN P,CHEN G,et al.CW output over 700W from fiber laser containing China-made double cladding ytterbium doped fiber[J].Chinese Journal of Lasers,2006,33(6):738(in Chinese).
[4] ZHOU J,LOU Q H,ZHU J H,et al.A continuous-wave 714W fiber laser with China-made large-mode-area double-clad fiber[J].Acta Optica Sinica,2006,26(7):1119-1120(in Chinese).
[5] JEONG Y,SAHU J K,PAYNE D N,et al.Ytterbium-doped large-core fiber laser with 1.36kW continuous-wave output power[J].Optics Express,2004,12(25):6088-6092.
[6] ZHAO P,ZHOU Sh H,ZHU Ch,et al.1.2kW output from high power fiber laser[J].Chinese Journal of Lasers,2006,33(10):1359(in Chinese).
[7] FAN T Y.Laser beam combining for high-power,high-radiance sourc-es[J].Selected Topics in IEEE J Q E,2005,11(3):567-577.
[8] ZHOU P,HOU J,CHEN Z L,et al.Comparison for coherent combining and spectrum combining of fiber lasers[J].Laser Technology,2008,32(4):413-416(in Chinese).
[9] XIAO R,HOU J,JIANG Z F.Coherent combining of fiber lasers[J].Laser Technology,2005,29(5):516-518(in Chinese).
[10] ZHANG K Q,LI D J.Electromagnetic theory for microwave and optoelectronics[M].2nd ed.Beijing:Publishing House of Electronics Industry,2001:363-364(in Chinese).
[11] LU D,GE T W,WU J,et al.Thermal-induced birefringence in double-clad fiber with non-circular inner cladding[J].Journal of Modern Optics,2009,56(6):638-645.