Patent ID: 8306422

Claim:
A Wavelength Division Multiplexed Passive Optical Network (WDM-PON) comprising: an Optical Line Terminal (OLT) including a first Arrayed Waveguide Grating (AWG) MUX/DEMUX comprising at least two input ports, each receiving optical signals of different wavelengths, and a plurality of output ports, each output port being coupled to a respective transceiver of the OLT; a remote node including a second AWG MUX/DEMUX comprising at least two input ports for receiving the optical signals of different wavelengths, and a plurality of output ports, each output port of the second AWG MUX/DEMUX being coupled to a respective PON having at least one optical network terminal (ONT); and respective first and second optical paths coupled between corresponding input ports of the first and second AWG MUX/DEMUXs, wherein: seed light of the WDM-PON is input into at least one of the first or second optical paths, a first wavelength mapping is defined between a first port of the first AWG and the output ports of the first AWG, a second wavelength mapping is defined between a second port of the first AWG and the output ports of the first AWG, the first and second wavelength mappings are different, and the first and second optical paths are enabled at different times to carry the optical signals of different wavelengths, the first optical path carrying the optical signals of different wavelengths based on the first wavelength mapping and the second optical path carrying the optical signals of different wavelengths based on the second wavelength mapping.