Long-Haul WDM/SDM Transmission over Coupled 4-Core Fiber with Coupled 4-Core EDFA and Its MDL Characteristics Estimation

We demonstrated WDM/SDM transmission of 32-Gbaud PDM-QPSK over coupled 4-core fibers and EDFAs with error-free after FEC for up to 2400 km. We estimated that rms MDL of 1.1 dB per loop was limiting performance.