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US 2016/0105251 A1Published application
Re-Modulation Crosstalk and Intensity Noise Cancellation in Wavelength-Division Multiplexing (WDM) Passive Optical Networks (PONs)
AssigneeFuturewei Technologies, Inc.
InventorNing Cheng
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Abstract
An apparatus comprising a signal generator configured to produce a modulation signal, a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal, and a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to generate an optical signal according to a difference between the modulation signal and the cancellation signal and transmit the optical signal towards a partial reflection mirror (PRM).
Claims20
An apparatus comprising:
- a signal generator configured to produce a modulation signal;
- a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal;
- and
- a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to:
- generate an optical signal according to a difference between the modulation signal and the cancellation signal;
- and
- transmit the optical signal towards a partial reflection mirror (PRM).
4 more elements
A method comprising:
- generating, via a signal generator, an electrical modulation signal;
- generating, via a filter, a cancellation signal according to the electrical modulation signal;
- subtracting the cancellation signal from the electrical modulation signal to produce a pre-compensated signal;
- and
- modulating a self-seeded reflective semiconductor optical amplifier (SS-RSOA) according to the pre-compensated signal to produce an optical signal;
- wherein the filter comprises a filter response associated with a round-trip delay between the SS-RSOA and a power reflection coefficient of a partial reflection mirror (PRM).
3 more elements
An apparatus comprising:
- an optical port configured to receive an optical signal modulated by an electrical signal comprising information data and a reflective crosstalk signal associated with a self-seeded reflective semiconductor optical amplifier (SS-RSOA);
- a filter coupled to the optical port and configured to filter the electrical signal to produce a cancellation signal for the reflective crosstalk signal;
- and
- a data recovery unit coupled to the optical port and the filter, wherein the data recovery unit is configured to recover the information data in the electrical signal according to a difference between the electrical signal and the cancellation signal.
1 more element
Dependencies are inferred from the claim text.