Turk Telekom has tested a 2T WDM system from Huawei on its live network.
The field trial achieved groundbreaking 40 Tbps C-band transmission over a single fiber over 307 km of G.652 fiber between Ankara, the capital of Turkey, and Cankiri.
Huawei said its WDM system used advanced 32QAM modulation to deliver a net SE of up to 8 b/s/Hz or 40Tb/s C-band transmission, meaning a capacity four times higher than mainstream commercial 100G systems. In addition, using Hybrid QAM technology with 20 Tbps capacities, the trial link consisted of fiber loop between Ankara and Istanbul, stretching 1,750 km without regeneration.
Hybrid QAM technology allows software-defined tuning of modulation formats such as QPSK, 8QAM, 16QAM, 32QAM, and 64QAM for different optical signals, bringing unprecedented flexibility in service-specific capacity and transmission distance configurations.
- In 2010, Turk Telekom built the national backbone network that stretches more than 34,000 km using Huawei’s next-generation WDM system, and in 2012, it deployed Huawei’s coherent 100G solution.
