Polarization diversity receiver systems and methods with polarization mode dispersion mitigation
AssigneeCiena Corporation
InventorMICHAEL Y. FRANKEL
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Abstract
The present disclosure relates to polarization diversity receiver systems and methods with polarization mode dispersion mitigation through processing. Specifically, the present invention includes a direct-detection receiver system that removes the requirement for a LO and an ADC thereby improving power, size, and cost over existing solutions, while at the same time allowing sufficient electronic processing to mitigate PMD impairment. The present invention can be realized in a processing block in CMOS technology front-ended with a polarization diversity receiver utilizing a 90 deg. optical hybrid.
Claims20
A receiver system, comprising:
- a polarization diversity receiver configured to provide full electric field capture of a received optical signal;
- and
- an electrical processing block configured to receive the full electric field from the polarization diversity receiver and to perform polarization mode dispersion (PMD) mitigation by mapping polarizations associated with PMD Principal States of Polarization with a corresponding time-domain electric field, wherein the polarizations are denoted as a slow state and a fast state.
A method, comprising:
- receiving an optical signal time-domain electric field;
- creating a copy of the time-domain electric field;
- mapping the time-domain electric field and the copied time-domain electric field to polarizations associated with polarization mode dispersion principal states of polarizations (PSP);
- and
- mitigating the polarization mode dispersion based on the mapping step.
A processing block for a receiver, comprising:
- circuitry comprising an input and an output;
- wherein the input is configured to receive time-domain electric fields corresponding to a received optical signal;
- wherein the output is configured to provide a polarization mode dispersion mitigated signal of the received optical signal;
- wherein the circuitry is configured to map the received time-domain electric fields to polarizations associated with polarization mode dispersion principal states of polarization;
- and
- wherein the polarizations are denoted as a slow state and a fast state.
Dependencies are inferred from the claim text.