All-Fiber Full-Duplex Bidirectional Data Transmission for Data Center Networks (DCNs) over 2-km Orbital Angular Momentum (OAM) Fiber using Commercial SFP+ Transceivers and Mode Selective Couplers

We experimentally demonstrate an all-fiber full-duplex bidirectional data transmission link for data center networks (DCNs) using orbital angular momentum (OAM) multiplexing over 2-km OAM fiber. Commercial SFP+ transceivers and mode selective couplers are employed to excite OAM<inf>+1</inf> and OAM<inf>−1</inf> modes carrying 10Gbase-T signals in the downlink and uplink transmission experiments, achieving less than −15.11 dB crosstalk.