EXTENDED GN MODEL FOR L-C BAND WITH FINAL EXPERIMENTAL VERIFICATIONS

EXTENDED GN MODEL FOR L-C BAND WITH FINAL EXPERIMENTAL VERIFICATIONSThe goal of this project is to analyze the GN-Model, to derive the GGN-Model and to compare both models. On the Introduction Chapter, the current state-of-the-art is briefly explained and which are the cutting-edge tools to estimate system performance. Nowadays, the huge data traffic growth has forced telecommunications companies and vendors to deploy ultra-wideband optical systems. To do so, they need of tools that allow them to estimate the system performance and to plan properly the optical network. Beyond of ASE noise impairments, the noise-like NLI power is also a critical issue that should be considered. This project evaluates the well-known Gaussian Noise Model and extends it to the Generalized Gaussian Noise Model to weight the spatial/frequency variations along the fiber. On the second Chapter the main optical fiber parameters are quickly remember. On the third Chapter, the metric used to defined the Quality of Transmission is explained and through this value, the system performance is estimated. The metric is basically the well-known Signal-to-Noise Ratio (SNR). On the fourth Chapter, the GN-Model is deeply described as well as its physical meaning. Some important results came out after comparing how the NLI power is accumulated varying system parameters (frequency spacing, number of spans etc). 50\% of total NLI power is accumulated between 3-7 channels (it depends on number of span and other system parameters). Furthermore, it was reported that the smaller the frequency spacing, the more incoherent is the NLI accumulation. On the fifth Chapter, the GGN-Model derivation is deeply explained. Main improvements wit respect to GN-Model are explained as well. On the Chapter 6, the model implementation and how all matlab files interact each others is clarified. Furthermore, Hyperbolic and Cartesian coordinates are compared in terms of consuming time. Finally on Chapter 7, all test and simulations carried out through this thesis are illustrated. The most important one is the full C-Band + 15 Channels on L-Band without tilt compensation. The performance on a channel, placed on the lowest side of the operating bandwidth, is reported to be 7 dB worst than that obtained on a channel, placed on the highest side of the operating bandwidth in terms of frequency.