16 x 112 Gb/s NRZ-DQPSK lab experiments and WDM field trial over ultimate Metro distances including high PMD fibers

A 16 x 112 Gb/s field transmission trial with EDFA only was performed over legacy fiber infrastructure of Deutsche Telekom having partially high PMD. Supported with a commercial PMD compensator, transmission over high PMD of 8 ps with negligible penalty was achieved. Enabled by the maturity of 43 Gb/s components we demonstrated 112 Gb/s NRZDQPSK modulation format Metro DWDM transmission with carrier-grade margins of 5 dB over 450 km Metro distances (3 dB over 764 km). By using high baudrate of 56Gbd, penalty free transmission is performed when co-propagating with either 10.7Gb/s NRZ or with 43 Gb/s PSBT signal channels.