Xtera and UCL Demonstrate a Record 74.38 Tbit/S per Fiber Transmission over Transoceanic Distances

摘要

Xtera, a provider of innovative subsea fiber optic technology, demonstrated the benefits of its advanced and novel approach to subsea line design by transmitting 74.38 Tbit/s over a transatlantic distance on Single Mode Fiber. This result gives a record-breaking spectral efficiency of 6.86 b/s/Hz over 6,300km, across the C and L bands. The experiment, which was performed in collaboration with University College London (UCL), used a hybrid distributed-Raman/EDFA amplifier with a bandwidth of 91 nm. This is an adaptation of the technology which Xtera currently deploys in its subsea repeaters, with a new Geometric Shaped DP-64 QAM constellation and adaptive FEC expertise coming from UCL, and hybrid Sumitomo Z+150 and Z Fiber.