［1］QUINTINO L, COSTA A, MIRANDA R, et al. Welding with high power fiber lasers—A preliminary study ［J］. Materials & Design, 2007, 28(4): 12311237.
［2］WANG J, WANG C M, MENG X X, et al. Study on the periodic oscillation of plasma/vapour induced during high power fiber laser penetration welding ［J］. Optics & Laser Technology, 2012, 44(1): 6770.
［3］ZHANG Y, CHEN G, WEI H, et al. A novel “sandwich” method for observation of the keyhole in deep penetration laser welding ［J］. Optics and Lasers in Engineering, 2008, 46 (2): 133139.
［4］KAWAHITO Y, KINOSHITA K, MATSUMOTO N, et al. Effect of weakly ionized plasma on penetration of stainless steel weld produced with ultra high power density fibre laser［J］. Science and Technology of Welding and Joining, 2008, 13(8): 749753.
［5］GAO M, CHEN C, HU M, et al. Characteristics of plasma plume in fiber laser welding of aluminum alloy［J］. Applied Surface Science, 2015, 326: 181186.
［6］SIBILLANO T, RIZZI D, ANCONA A, et al. Spectroscopic monitoring of penetration depth in CO2 Nd: YAG and fiber laser welding processes［J］. Journal of Materials Processing Technology, 2012, 212(4): 910916.
［7］李时春, 陈根余, 周聪, 等. 万瓦级光纤激光焊接过程中小孔内外等离子体研究［J］. 物理学报, 2014, 63(10): 191198.
LI Shichun, CHEN Genyu, ZHOU Cong, et al. Plasma inside and outside keyhole during 10 kW level fiber laser welding［J］. Acta Physica Sinica, 2014, 63(10): 191198.
［8］刘桂谦, 高向东. 基于高速影像的激光焊金属蒸气周期性分析［J］. 焊接技术, 2013, 42(6): 79.
LIU Guiqian, GAO Xiangdong. Periodic analysis of metal vapor during laser welding based on highspeed camera［J］. Welding Technology, 2013, 42(6): 79.
［9］SUN D, CAI Y, WANG Y, et al. Effect of HeAr ratio of side assisting gas on plasma 3D formation during CO2 laser welding［J］. Optics and Lasers in Engineering, 2014, 56(5): 4149.
［10］ZHANG Z Y. A flexible new technique for camera calibration［J］. IEEE Transactions on Pattern Analysis and Machine Intanelligence, 2000, 22(11): 13301334.
［11］SUN D, CAI Y, WU Y, et al. Effect of external constraint on the characteristics and behavior of the plasma plume during highpower CO2, laser welding［J］. The International Journal of Advanced Manufacturing Technology, 2014, 73(9): 12531263.