32-core Dense SDM Unidirectional Transmission of PDM-16QAM Signals Over 1600 km Using Crosstalk-managed Single-mode Heterogeneous Multicore Transmission Line

Abstract

Abstract:We demonstrate a 32-core dense space division multiplexed (DSDM) transmission of PDM-16QAM 20-WDM signals over 1644.8km with a record aggregate SE distance product of 331,300b/s/Hz·km employing a low-crosstalk 32-core fiber in a partial recirculating-loop system.

Review of Space-Division Multiplexing Technologies in Optical Communications

“…Therefore, a practical and optimal solution is still being pursued. SM-MCF is much easier to achieve large capacity/longdistance transmission because single-mode propagation is stable and the increase in the core number directly reflects on the total capacity [20,21,22,23,24]. FM-MCF has a considerable potential of providing ultimate capacity and spatial channel counts [25,26,27,28,29,30]; however, the transmission system tends to be complex.…”

Development and Future of Optical Fiber Related Technologies

“…And coupled-core transmission, which uses multiple cores for one signal, has also been invented in 2015, NICT used of single-mode cores and reported a 2.15 Pb/s transmission through a 22-core homogeneous single-mode multi-core fiber [22]. And in 2016 NTT reported the transmission of PDM-16QAM signals over 1600 km using 32-core heterogeneous single-mode multi-core fiber [23]. As regards a few mode core, in 2016 KDDI reported 665 and 947b/s/Hz SDM/WDM transmissions over 6-mode 19-core fiber using DP16 QAM/64QAM signals [24].…”

All-optical feedforward automatic gain control scheme for pump power shared erbium-doped fiber amplifiers

“…Optical fiber transmission systems using space-division multiplexing technologies have been intensely studied in recent years in order to realize ultra-high transmission capacities of Peta bps class in future [1,2,3]. Multicore fiber transmission is one of the promising technologies for such systems.…”

“…Multicore fiber transmission is one of the promising technologies for such systems. The multicore-based erbiumdoped fiber amplifiers (MC-EDFAs), i.e., multicore EDFA and fiber-bundled EDFA, are crucial devices in multicore fiber transmission systems [1,2,3]. All or some of the cores of the MC-EDFA are pumped by a single pump laser diode (LD) module so that the electrical power consumption of the MC-EDFA can be significantly reduced [4].…”

“…The PS-EDFA has an EDFA gain block (GB) section and an AGC circuit section. The number of cores (N) is set to be 3 for simplicity in the figure, although the values of N reported to date are 7, 12, 19, and so on [1,2,3]. The three cores are labeled from C1 to C3.…”