Experimental Demonstration of 8.4-Tbit/s Data Transmission over an 18-km Orbital Angular Momentum (OAM) Fiber using WDM and OAM based Mode Division Multiplexing (MDM). - Long Zhu; Andong Wang; Lulu Wang 014; Jianzhou Ai; Jun Liu 073; Yifan Zhao 003; Shuhui Li 005; Cheng Du; Qi Mo; Jian Wang 060 (ECOC, 2017)