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

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 proper...

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Bibliographic Details
Published in:Optics letters 2020-10, Vol.45 (19), p.5550-5553
Main Authors: Skidin, A. S., Sidelnikov, O. S., Fedoruk, M. P.
Format: Article
Language:English
Subjects:
Bit error rate
Constellations
Cost analysis
Distortion
Optical communication
Orthogonal Frequency Division Multiplexing
Polarization
Pulse duration modulation
Quadrature amplitude modulation
Redundancy
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.402401