Abstract
We experimentally demonstrate a bidirectional space-division multiplexing passive optical network system by using a commercial directly modulated laser modulated by a 25 Gb/s NRZ-OOK signal, and followed by a polarization-diversity silicon micro-ring resonator (PolD-MRR) for enhancing the modulation extinction ratio. A multi-core fiber with negligible inter-core crosstalk is used for bidirectional transmission, not only increasing the aggregated capacity but also simplifying the splitting of upstream and downstream and enabling colorless optical network units. The capacity of 100 Gb/s for downstream and 75 Gb/s for upstream has been achieved, respectively. In addition, transmission capacity could be further increased by wavelength-division multiplexing according to PolD-MRR periodical feature, which might be beneficial for future large-capacity optical access networks.
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