WDM field trial over 764 km SSMF with 16 × 112 Gb/s NRZ-DQPSK co-propagating with 10.7 Gb/s NRZ

A 16×112Gb/s field trial was performed at the Deutsche Telekom fiber infrastructure with partially high PMD. Using 56Gbaud NRZ-DQPSK, no penalty could be observed when co-propagating with a 10.7Gb/s NRZ. Robust Metro DWDM transmission with attractive carrier-grade margins is demonstrated.