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The authors demonstrate an optical access network architecture utilizing the wavelength-selective behavior of micro-ring modulators to achieve Single-SideBand (SSB) modulation, which generates a downstream signal and simultaneously provides a centrally distributed carrier for upstream phase-remodulation. Cascaded silicon micro-rings are capable for Complementary Metal - Oxide - Semiconductor (CMOS) integration and multichannel SSB modulations which can help to significantly reduce the cost of the Wavelength-Division-Multiplexed (WDM) Passive Optical Networks (PONs). They further study the power penalty induced by Rayleigh backscattering from the centrally distributed carrier and show a power penalty of less than 0.6 dB when propagating 43 km of a single feeder fiber.
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