Accurate Closed-Form GN/EGN-Model Formula Leveraging a Large QAM-System Test-Set

We tested the accuracy of a fully-closed-form approximate GN-model formula over 3000 different $C$ -band fully-loaded WDM-QAM system scenarios and 1200 partially-loaded ones. By leveraging the large system test-set, we modified the formula to obtain a closed-form formula approximating the enhanced GN-model (EGN-model). The combined high accuracy and very fast computation time (ms) of such formula potentially make it an effective tool for real-time physical-layer-aware optical network management and control.