40x200Gb/s single carrier PDM-QPSK transmission over 12,000km

We demonstrate the longest WDM transmission at 200Gb/s using single-carrier PDMQPSK modulation format. A distance of 12,000km is achieved transmitting 40 channels through an EDFA-only uncompensated fiber link. OCIS codes: (060.1660) coherent communication; (060.4510) optical communication