All-optical phase discrimination using SOA

We describe the first experimental demonstration of a novel all-optical phase discrimination technique, which can separate the two orthogonal phase components of a signal onto different frequencies. This method exploits nonlinear mixing in a semiconductor optical amplifier (SOA) to separate a 10.65...

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Bibliographic Details
Published in:Optics express 2013-11, Vol.21 (22), p.25664-25669
Main Authors: Power, Mark J, Webb, Roderick P, Manning, Robert J
Format: Article
Language:English
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Summary:We describe the first experimental demonstration of a novel all-optical phase discrimination technique, which can separate the two orthogonal phase components of a signal onto different frequencies. This method exploits nonlinear mixing in a semiconductor optical amplifier (SOA) to separate a 10.65 Gbaud QPSK signal into two 10.65 Gb/s BPSK signals which are then demodulated using a delay interferometer (DI). Eye diagrams and spectral measurements verify correct operation and a conversion efficiency greater than 9 dB is observed on both output BPSK channels when compared with the input QPSK signal.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.025664