Project and implementation of coherent optical networks based on code division multiple access (OCDMA) technique

Abstract

This project has as main objective a research training for Professor Anderson Leonardo Sanches as well as the concomitant development of activities developed by the research group Information Engineering established at the Federal University of ABC regarding the implementation of optical code-division multiple-access (OCDMA) technology in innovative architectures to be used in the next generation optical access networks (NG-PON-3).This necessarily involves the accomplishment of a 12-month post-doctoral period at the University of Strathclyde, UK. This visiting period will enable the researcher requesting this project to carry out real-time experimental analysis of any kind of approach, since the hosting researcher Professor Ivan Glesk will provide facilities such as a 20 km-long OCDMA network infrastructure along with an additional 20 km span from a chamber situated outside the laboratory premises. It is worth mentioning that the aforementioned infrastructure is one of the few practical facilities of OCDMA technology currently in existence, and therefore this project will be very important in the standardization accomplishment to be adopted in NG-PON-3. In addition, this project has the specific objective of implementing advanced OCDMA network architectures based on coherent modulation formats. In this context, several configurations of coherent OCDMA networks operating in both single-rate and multiple data rates will be proposed and evaluated.Furthermore, adaptive methods (related to the channel's conditions) will be addressed in such a way that high and low order modulation formats are assigned to users with high and low transmission rates, respectively. Finally, it will be eventually possible to corroborate the results from several new theoretical models (as well as from the proposals already made in recent years by the requesting researcher) with results obtained through the experimental observations and, therefore, further validating the mathematical formalisms developed for performance evaluation of coherent OCDMA networks.