Autonomous Optical Networks that fully exploit System Margins******

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Current dense wavelength division multiplexed systems typically use channels with carrier frequencies in the C-band (191.15-196.10 THz), channel bandwidths of 50 GHz, and static, homogeneous channel plans. The proposed research is aimed at emerging optical fiber transmission systems with dynamic, heterogeneous channel plans supporting multiple symbol rates, modulation formats, and channel bandwidths. The primary challenge is to determine the extent to which optical performance monitoring and transmission engineering techniques can be combined to enable the flexible and dynamic reconfiguration of transmission links to meet traffic requirements. The autonomous estimation of relevant system attributes and performance metrics will determine the degree to which this dynamism can be pushed in practical networks while providing reliable transmission and respecting implementation feasibility given foreseeable advances in enabling technologies.**Key aspects of the proposed research include (i) developing reliable and accurate techniques to estimate system attributes and performance metrics, (ii) determining autonomous rate adaptation schemes based on, for example, coding and probabilistic/geometric constellation shaping, that exploit the estimated information to dynamically optimize the spectral efficiency and achievable transmission distance of core networks, and (iii) devising low latency codes and novel transceiver architectures that exploit the estimated information to meet the wide variety of transmission requirements found in edge networks, while offering reductions in energy consumption and space requirements. An important distinguishing feature of the activities is the pursuit of the objectives in an context directly relevant to industry, and in particular the project partner Ciena: namely across a variety of system configurations that are representative of those seen in practice, and in terms of system margins, which are ultimately of paramount importance to system designers charged with the arduous quest of minimizing them while ensuring reliable transmission.