Abstract
We propose a novel method for signal processing of phase-modulated signals
suitable for 100 G coherent systems. By exploiting a single semiconductor
optical amplifier Mach–Zehnder interferometer, all-optical selective
switching with simultaneous wavelength conversion of bursts of data in the
original signal is demonstrated. The operation is suitable for dynamic wavelength
routing and/or add/drop operation in multichannel coherent systems, thus enabling
flexible network resources optimization. The operation has been demonstrated
for single-channel single-polarization, dual-channel (DC) single-polarization,
and DC polarization-multiplexed (PM) 28 GBaud quadrature phase shift key-modulated
signals. By exploiting coherent detection strategy and digital signal processing,
an error rate below 10<sup>-3</sup> prior to forward error correction has been observed for all the
experiments; the corresponding optical signal-to-noise ratio penalty has been
measured to be almost negligible in the single-polarization case whereas a
maximum penalty below 1.5 dB for the PM one is reported.
© 2012 IEEE
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