Differential complex modulation optical receiver having compensation of Kerr effect phase noise
First Claim
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1. An optical receiver for receiving an optical signal having nonlinear phase noise accumulated over one or more spans, comprising:
- a complex signal estimator for estimating differential complex components for said optical signal; and
an intensity-scaled phase noise compensator using information for a differential signal strength of said optical signal for compensating for said phase noise in said differential complex components and providing a phase noise compensated representation of said differential complex components.
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Abstract
A method and apparatus for reducing nonlinear phase noise that is induced in an optical transmission system by the interaction of optical amplifier noise and Kerr effect. The apparatus includes an intensity-scaled nonlinear phase noise compensator. The phase noise compensator reduces the nonlinear phase noise by applying a scaled differential signal strength estimate to estimated differential quadrature components or an estimated differential phase for providing a phase noise compensated representation.
18 Citations
34 Claims
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1. An optical receiver for receiving an optical signal having nonlinear phase noise accumulated over one or more spans, comprising:
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a complex signal estimator for estimating differential complex components for said optical signal; and an intensity-scaled phase noise compensator using information for a differential signal strength of said optical signal for compensating for said phase noise in said differential complex components and providing a phase noise compensated representation of said differential complex components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for receiving an optical signal having nonlinear phase noise accumulated over one or more spans, comprising:
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estimating differential complex components for said optical signal; and using information for a differential signal strength for compensating for said phase noise in said differential complex components for providing a phase noise compensated representation of said differential complex components. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification