Optical multi-wavelength dual-polarization transceivers

A multi-wavelength dual-polarization (DP) receiver comprising:

• an input port configured to receive input light;
• an optical polarization splitter and rotator configured to split the input light into a first optical waveguide and a second optical waveguide;
• a first wavelength demultiplexer connected to the first optical waveguide and configured to output wavelength-demultiplexed light into a first plurality of optical waveguides;
• a second wavelength demultiplexer connected to the second optical waveguide and configured to output wavelength-demultiplexed light into a second plurality of optical waveguides;
• a plurality of optical multi-input-multi-output (MIMO) polarization demultiplexers, each of which is connected to a respective one of the first plurality of optical waveguides and one of the second plurality of optical waveguides;
• and
• circuitry configured to detect, from a first output and a second output of each of the plurality of MIMO polarization demultiplexers, a first modulated signal and a second modulated signal, respectively.