Optical receiver apparatus and method
AssigneeAlcatel-Lucent USA Inc.
InventorsAnjali Agarwal, Andreas Benz, Sethumadhavan Chandrasekhar, Peter J. Winzer
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Abstract
A method and apparatus for receiving narrowband filtered optical PSK signals, including converting PSK optical signals into intensity-modulated signals at a receiver, and introducing a desired amplitude imbalance between the first and the second intensity-modulated signals to improve receiver performance.
Claims8
A method for receiving at a receiver, a narrowband filtered optical phase shift keyed (PSK) signal, the method comprising the steps of:
- converting the PSK signal into first and second intensity-modulated signals;
- and
- mitigating performance degradation due to narrowband filtering, exhibited in an output signal representing the PSK signal, wherein said mitigating includes the steps of;
- introducing a desired amplitude imbalance between the first second intensity modulated signals;
- detecting the amplitude imbalanced first and second intensity modulated signals;
- and
- combining the detected amplitude imbalanced first and second intensity modulated signals into the output signal.
A method for receiving at a receiver, a narrowband filtered optical phase shift keyed (PSK) signal, the method comprising the steps of:
- converting the PSK signal into a first intensity-modulated signal and a second intensity-modulated signal respectively;
- and
- mitigating performance degradation due to narrowband filtering, exhibited in an output signal representing the PSK signal, wherein said mitigating includes the steps of;
- introducing a desired amplitude imbalance between the first and the second intensity modulated signals;
- detecting the amplitude imbalanced first and second intensity modulated signals;
- and
- combining the detected amplitude imbalanced first and second intensity modulated signal into the output signal,
- such that the introduced amplitude imbalance substantially reduces the optical signal-to-noise ratio of the PSK signal required for substantially error-free transmission.
Dependencies are inferred from the claim text.