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A highly reliable wavelength division multiplexing passive optical network delivering up/downstream and broadcast signals simultaneously is proposed in this paper. In this scheme, subcarrier multiplexing is introduced at the optical line terminal. The optical carriers are used for the transmission of point-to-point and broadcast signals. The combination of intensity modulation and phase modulation is employed to improve modulation efficiency. Pure double-sideband subcarriers function as the light source for upstream modulation. The design of OLT and RN can provide protection for downstream and broadcast signal when fiber failure occurs. A simulation study is performed to demonstrate this transmission system at the end of this paper.

Novel Colorless WDM-PON Featuring Optional Broadcast Service and High Reliability