Flexible TWDM PON with load balancing and power saving

An apparatus comprising:

• an arrayed waveguide grating (AWG) comprising a plurality of AWG ports;
• a power splitter comprising a plurality of splitter ports;
• and
• a plurality of optical interleavers, each coupled to a respective AWG port and a respective splitter port, for directing incoming optical signals to one of the AWG and the power splitter;
• an optical line terminal (OLT) comprising a plurality of transceiver modules configured to communicate with a plurality of sets of optical network units (ONUs) via at least the optical interleavers, wherein the plurality of transceiver modules comprise one or more transceiver modules, each configured to:
• transmit optical signals with a first set of wavelengths that are directed by a first optical interleaver of the plurality of optical interleaves to the respective AWG port;
• and
• transmit optical signals with a second set of wavelengths that are directed by the first optical interleaver to the respective splitter port, wherein the second set of wavelengths are shifted with respect to the first set of wavelengths,
• wherein the AWG and the power splitter are configured to communicate with the plurality of sets of ODNs via a plurality of optical distribution networks (ODNs), wherein each set of ONUs is communicated via a respective ODN, wherein optical signals entering an AWG port are directed to one ODN, and wherein optical signals entering a splitter port are directed to two or more of the ODNs.