Yao Yuhong, Li Yanfeng, Liu Bowen, Hu Minglie, Chai Lu, Wang Qingyue, Tong Weijun, Luo Jie. Analysis of Real Photonic Crystal Fibers by Finite-Difference Frequency-Domain Method Combined with Digital Image Processing[J]. Acta Optica Sinica, 2008, 28(7): 1384