Modelling and Evaluating Optical Transmission with the OCATA Optical Time Domain Digital Twin

We review the basis of the OCATA digital twin, including the information that can be extracted from IQ optical constellations, how optical time-domain propagation can be modelled using Deep Neural Networks, and tuned from telemetry data. We cover from single channel to multiple sub-carrier signals and multi-band optical transmission. Applications of OCATA are afterward reviewed, including accurate quality of transmission (QoT) estimation and nonlinear noise mitigation.