56-Gbaud PAM4 Transmission over 2-km 125-μm-Cladding 4-Core Multicore Fibre for Data Centre Communications

We demonstrate single-wavelength and single-fibre 400-Gb/s transmission using 4 cores is achieved without parallel SMFs. In addition, 1.6-Tb/s transmissions using 56-Gbaud PAM4 LAN- and C-WDM signals across O and C/L-band over 2-km 125-μm-cladding 4-core MCF is achieved.