Name: Bruno Cardoso Coutinho
Type: PhD thesis
Publication date: 08/04/2016

Namesort descending Role
Marcelo Eduardo Vieira Segatto Advisor *

Examining board:

Namesort descending Role
Jair Adriano Lima Silva Internal Examiner *
Leandro Colombi Resendo External Examiner *
Marcelo Eduardo Vieira Segatto Advisor *
Maria Jose Pontes Internal Examiner *
Maria Thereza Miranda Rocco Giraldi External Examiner *

Summary: The coherent optical systems emerge as an efficient alternative in implementation of optical transmission networks to high transmission rates, for they have as the main advantage a greater spectral efficiency in propagation of information, since they consider the set intensity and phase of optical signal on detection of data transmitted via network. By using this feature of coherent optical signal with digital signal processing techniques, it is possible to achieve rates of the order, or even greater than 100 Gb/s to the backbone networks. However, with increasing transmission speed, judicious care with linear and non-linear effects of physical layer over the optical signals it is necessary, so that the degree of degradation in quality of transmission over the optical path does not get below acceptable limits. Simulations are already carried out and described in the literature with the aim of measuring this quality of transmission to a link (point-to-point), that is, they consider only the route between a transmitting node and the respective adjacent receiving node. However, an optical path or route may have two or more links interleaved by switching nodes. The question used as a driver of this research was: how to extend the simulations of a single link for the simulation of physical layer in the context of networks? Therefore, in this study was proposed a method of integrating of the physical and network layers in order to allow the analysis of the degradation suffered by optical signals co-propagating and doubly polarized, for taking into account its propagation for its optical routes through one or more switching nodes. With this technique it was possible to check the quality of transmission of multiple optical channels at the end of the reception, in the context of optical transport networks.

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