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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 33,
  • Issue 15,
  • pp. 3254-3264
  • (2015)

Digital Post-Compensation of Nonlinear Distortions in Wavelength Conversion Based on Four-Wave Mixing in a Semiconductor Optical Amplifier

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Abstract

We present a novel low-complexity digital filter-based backpropagation (DFBP) technique to compensate the nonlinear distortions induced by a wavelength converter based on four-wave mixing in a semiconductor optical amplifier. We first develop the DFBP based on a small-signal approximation and probe performance via numerical simulations. We also experimentally demonstrate that application of DFBP to wavelength conversion of 10 Gbaud 16-QAM and 5 Gbaud 64-QAM signals significantly improves the error-vector magnitude and the bit error rate when the wavelength converted signal is limited by the nonlinear distortions.

© 2015 IEEE

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