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In the development of the present article, the information theory of Shannon is adapted and equation is proposed for the measurement of the spectral efficiency in order to be applied to the new optical network environments NG-PON (Next Generation Passive Optical Network) proposed by the FSAN task group (Full Service Access Network) of ITU-T. This development will allow to control certain parameters and configuration characteristics of the systems based on optical fiber to achieve improvements in the spectral efficiency, high access capacities and large bandwidths; allowing to understand in a clearer way, the changes that the DWDM network architectures (Dense Wavelength Division Multiplexing) have suffered in recent years as a vision of the future of telecommunications

Adaptación de la teoría de la información para el régimen de propagación lineal de una red óptica DWDM de próxima generación