Redes de Bragg para filtragem em sistemas WDM

Abstract

In this contribution it is demonstrated the efficiency of apodized Bragg gratings, with negative variation of the refractive index, as optical filters in wavelength division multiplexing (WDM) systems, acting simultaneously as demultiplexers and dispersion compensators. Using a negative apodized Bragg grating, with a Gaussian profile, it is possible to demultiplex a 160 Gbit/s (8×20 Gbit/s) WDM signal packed in approximately 1.5 nm (≈0.85 bit/s/Hz spectral efficiency).