Spectral analysis for coherent optical receivers
AssigneeOclaro, Inc.
InventorSunil Kumar Singh Khatana
Life of this patent
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Abstract
A coherent optical receiver measures a portion of a spectra of a multi-channel optical signal that includes at least one signal adjacent to a selected signal. The coherent optical receiver determines structure and bandwidth information for the measured portion of spectra, and determines one or more filter parameters for the selected signal based on the structure and bandwidth information of the at least one signal adjacent to the selected signal. The coherent optical receiver adjusts one or more active filter parameters of a carrier phase estimator in the optical coherent receiver to have values corresponding to the determined one or more filter parameters.
Claims20
A method comprising:
- measuring, by an optical coherent receiver, a portion of a spectra of a multi-channel optical signal that includes at least one signal adjacent to a selected signal;
- determining structure and bandwidth information for the measured portion of spectra;
- determining one or more filter parameters for the selected signal based on the structure and bandwidth information of the at least one signal adjacent to the selected signal;
- and
- adjusting one or more active filter parameters of a carrier phase estimator in the optical coherent receiver to have values corresponding to the determined one or more filter parameters.
A method comprising:
- providing instructions to an optical front end of an optical coherent receiver to measure a portion of a spectra of a multi-channel optical signal that includes at least one signal adjacent to a selected signal;
- retrieving structure and bandwidth information for the measured portion of spectra from a digital signal processing (DSP) modem of the optical coherent receiver;
- determining one or more filter parameters for the selected signal based on the structure and bandwidth information of the at least one signal adjacent to the selected signal;
- and
- providing instructions to the DSP modem to cause a carrier phase estimator to adjust one or more active filter parameters values to match the values of the determined one or more filter parameters.
A non-transitory computer-readable medium containing computer-executable instructions for execution by a controller of an optical coherent receiver, the instructions comprising steps for:
- providing instructions to an optical front end of an optical coherent receiver to measure a portion of a spectra of a multi-channel optical signal that includes at least one signal adjacent to a selected signal;
- retrieving structure and bandwidth information for the measured portion of spectra from a digital signal processing (DSP) modem of the optical coherent receiver;
- determining one or more filter parameters for the selected signal based on the structure and bandwidth information of the at least one signal adjacent to the selected signal;
- and
- providing instructions to the DSP modem to cause a carrier phase estimator to adjust one or more active filter parameters values to match the values of the determined one or more filter parameters.
Dependencies are inferred from the claim text.