Polarization diverse demultiplexing
AssigneeInternational Business Machines Corporation
InventorsSolomon Assefa, Douglas M. Gill, William M. Green
Life of this patent
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Abstract
A method for demultiplexing an optical signal includes receiving a multi polarization optical signal, separating the multi polarization optical signal into a first polarization optical signal and a second polarization optical signal, rotating a polarization of the first polarization optical signal to match a polarization of the second polarization optical signal, routing the first polarization optical signal and the second polarization optical signal to a common demultiplexing device, outputting a channel of the first polarization optical signal and the second polarization optical signal to a common photodetector.
Claims20
A method for demultiplexing an optical signal, the method comprising:
- receiving a multi polarization optical signal;
- separating the multi polarization optical signal into a first polarization optical signal and a second polarization optical signal;
- rotating a polarization of the first polarization optical signal to match a polarization of the second polarization optical signal;
- focusing the rotated first polarization optical signal and the second polarization optical signal to a focal point located upstream from a common demultiplexing device to generate a multi-mode optical field and routing the rotated first polarization optical signal and the second polarization optical signal to the common demultiplexing device;
- outputting a channel including the rotated first polarization optical signal and the second polarization optical signal each having the matching polarization to a common photodetector.
A method for demultiplexing an optical signal, the method comprising:
- receiving a multi polarization optical signal;
- separating the multi polarization optical signal into a first polarization optical signal and a second polarization optical signal with a polarization splitter;
- rotating a polarization of the first polarization optical signal to match a polarization of the second polarization optical signal with a polarization rotator;
- focusing the rotated first polarization optical signal and the second polarization optical signal to a focal point located upstream from a common demultiplexing device to generate a multi-mode optical field and routing the rotated first polarization optical signal and the second polarization optical signal to the common demultiplexing device;
- outputting a channel including the rotated first polarization optical signal and the second polarization optical signal each having the matching polarization to a common photodetector.
A method for demultiplexing an optical signal, the method comprising:
- receiving a multi polarization optical signal;
- separating the multi polarization optical signal into a first polarization optical signal and a second polarization optical signal and rotating a polarization of the first polarization optical signal to match a polarization of the second polarization optical signal with a polarization splitting grating;
- focusing the rotated first polarization optical signal and the second polarization optical signal to a focal point located upstream from a common demultiplexing device to generate a multi-mode optical field and routing the rotated first polarization optical signal and the second polarization optical signal to the common demultiplexing device;
- outputting a channel including the rotated first polarization optical signal and the second polarization optical signal each having the matching polarization to a common photodetector.
Dependencies are inferred from the claim text.