A method for communication, the method comprising: in an optical transceiver, the optical transceiver comprising an input optical fiber, a beam splitter, and a plurality of thin film filters (809B-F) coupled to a photonics die, the thin film filters (809B-F) being arranged above corresponding grating couplers in the photonics die: receiving an input optical signal comprising a plurality of different wavelength signals via the input optical fiber; splitting the input optical signal into signals of a first polarization and signals of a second polarization using the beam splitter by separating the signals of the second polarization laterally from the signals of the first polarization; communicating the signals of the first polarization and the second polarization to the plurality of thin film filters (809B-F). separating, using the plurality of thin film filters (809B-F): the communicated signals of the first polarization into a first plurality of signals that each correspond to one of the different wavelength signals, the communicated signals of the second polarization into a second plurality of signals that each correspond to one of the different wavelength signals; and communicating each of the signals of the first and second pluralities of signals to a corresponding grating coupler in the photonics die. in an optical transceiver, the optical transceiver comprising an input optical fiber, a beam splitter, and a plurality of thin film filters (809B-F) coupled to a photonics die, the thin film filters (809B-F) being arranged above corresponding grating couplers in the photonics die: receiving an input optical signal comprising a plurality of different wavelength signals via the input optical fiber; splitting the input optical signal into signals of a first polarization and signals of a second polarization using the beam splitter by separating the signals receiving an input optical signal comprising a plurality of different wavelength signals via the input optical fiber; splitting the input optical signal into signals of a first polarization and signals of a second polarization using the beam splitter by separating the signals of the second polarization laterally from the signals of the first polarization; communicating the signals of the first polarization and the second polarization to the plurality of thin film filters (809B-F). separating, using the plurality of thin film filters (809B-F): the communicated signals of the first polarization into a first plurality of signals that each correspond to one of the different wavelength signals, the communicated signals of the second polarization into a second plurality of signals that each correspond to one of the different wavelength signals; and communicating each of the signals of the first and second pluralities of signals to a corresponding grating coupler in the photonics die. communicating the signals of the first polarization and the second polarization to the plurality of thin film filters (809B-F). separating, using the plurality of thin film filters (809B-F): the communicated signals of the first polarization into a first plurality of signals that each correspond to one of the different wavelength signals, the communicated signals of the second polarization into a second plurality of signals that each correspond to one of the different wavelength signals; and the communicated signals of the first polarization into a first plurality of signals that each correspond to one of the different wavelength signals, the communicated signals of the second polarization into a second plurality of signals that each correspond to one of the different wavelength signals; and communicating each of the signals of the first and second pluralities of signals to a corresponding grating coupler in the photonics die.