Polarization multiplexed OFDM band interleaving enabled metro-access integrated networks

In this paper, we propose a novel “ring + tree” topology enabled optical metro-access integrated networks (MAIN), using polarization multiplexed band interleaving (PMBI) of optical multiband orthogonal frequency division multiplexing (MB-OFDM) technology. In this proposed MAIN, the services for downstream and upstream transmission are carried by two orthogonal polarization states, respectively. By utilizing the proposed structure in each central node (CN) with the common or low-order filters, the MAIN system with three CNs has been successfully simulated. Finally, the obtained results verify the feasibility of our proposed MAIN system with high spectral efficiency.