Statistical properties of nonlinear distortion of a polarization-multiplexed OFDM signal in long-haul fiber links

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Abstract

We investigate nonlinear transmission regimes of a polarization-multiplexed 16-quadrature amplitude modulation (PDM-16-QAM) orthogonal frequency-division multiplexed (OFDM) signal in a long-haul optical link. We study the dependence between the strength of nonlinear distortion and statistical properties of a PDM-OFDM signal. We also consider the constellation shaping-based solutions that allow to significantly reduce the bit error rate (up to three to 12 times at the cost of 5%-20% signal redundancy) and propose a method to analytically optimize the symbol distribution for higher-order modulation formats using only the initial signal.

Original languageEnglish
Pages (from-to)5550-5553
Number of pages4
JournalOptics Letters
Volume45
Issue number19
DOIs
Publication statusPublished - 30 Sep 2020

Keywords

  • TRANSMISSION
  • EQUALIZATION
  • MODULATION

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