Analyzing OAM mode purity in optical fibers with CNN-based deep learning Lin, Tianying ; Liu, Ang ; Zhang, Xiaopei ; Li, He ; Wang, Liping ; Han, Hailong ; Chen, Ze ; Liu, Xiaoping ; Lü, Haibin Abstract Publication: Chinese Optics Letters Pub Date: 2019 DOI: 10.3788/COL201917.100603 Bibcode: 2019ChOpL..17j0603L