Real-Time 7-Core SDM Transmission System Using Commercial 400 Gbit/s OTN Transceivers and Network Management System

Abstract: Space-division multiplexing (SDM) utilizing uncoupled multi-core fibers (MCF) is considered a promising candidate for next-generation high-speed optical transmission systems due to its huge capacity and low inter-core crosstalk. In this paper, we demonstrate a real-time high-speed SDM transmission system over a field-deployed 7-core MCF cable using commercial 400 Gbit/s backbone optical transport network (OTN) transceivers and a network management system. The transceivers employ a high noise-tolerant quadrature phase shift keying (QPSK) modulation format with a 130 Gbaud rate, enabled by optoelectronic multiple-chip module (OE-MCM) packaging. The network management system can effectively manage and monitor the performance of the 7-core SDM OTN system and promptly report failure events through alarms. Our field trial demonstrates the compatibility of uncoupled MCF with high-speed OTN transmission equipment and network management systems, supporting its future deployment in next-generation high-speed terrestrial cable transmission networks.

Keywords: multi-core fiber; real-time transmission; optical transport network; field trial; network management system