CHEN Zhe, XIE Junxin, LUO Yunhan, TANG Jieyuan, HUANG Huacai, YU Xinyu, GAN Hongbo, MA Yue, WEI Qingsong, YU Jianhui, ZHANG Jun, LU Huihui, PENG Jinggang. Determination of Azimuth Angle of Photonic Crystal Fiber by Characteristic Analysis of Side Transmission Images[J]. Acta Photonica Sinica, 2014, 43(6): 606001