Method and system for eliminating polarization dependence for 45 degree incidence MUX/DEMUX designs
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United States of America Patent
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Nov 5, 2019
Grant Date -
Apr 18, 2019
app pub date -
Oct 11, 2018
filing date -
Oct 12, 2017
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Abstract
Methods and systems for eliminating polarization dependence for 45 degree incidence MUX/DEMUX designs may include an optical transceiver, where the optical transceiver comprises an input optical fiber, a beam splitter, and a plurality of thin film filters coupled to a photonics die. The thin film filters are arranged above corresponding grating couplers in the photonics die. The transceiver may receive an input optical signal comprising different wavelength signals via the input optical fiber, split the input optical signal into signals of first and polarizations using the beam splitter by separating the signals of the second polarization laterally from the signals of the first polarization, communicate the signals of the first polarization and the second polarization to the plurality of thin film filters, and reflect signals of each of the plurality of different wavelength signals to corresponding grating couplers in the photonics die using the thin film filters.
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