Li Zhen, Zhou Jun, Xue Yuhao, He Bing, Liu Chi, Qi Yunfeng, Dong Jingxing, Wei Yunrong, Lou Qihong, Pan Zhiyong. Discussion on Applying β Factor in the Evaluation of Beam Quality of the Passive Coherent Beam Combination System[J]. Chinese Journal of Lasers, 2011, 38(11): 1102012