Joint mitigation of laser phase noise and fiber nonlinearity for polarization-multiplexed QPSK and 16-QAM coherent transmission systems | Zendy

Mohamed Morsy-Osman | Zendy; Qunbi Zhuge | Zendy; Lawrence R. Chen | Zendy; David V. Plant | Zendy

Open Access

Joint mitigation of laser phase noise and fiber nonlinearity for polarization-multiplexed QPSK and 16-QAM coherent transmission systems

Author(s) -

Mohamed Morsy-Osman,

Qunbi Zhuge,

Lawrence R. Chen,

David V. Plant

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.00b329

Subject(s) - phase noise , quadrature amplitude modulation , polarization division multiplexing , electronic engineering , optics , subcarrier , phase shift keying , multiplexing , subcarrier multiplexing , transmission (telecommunications) , qam , computer science , physics , orthogonal frequency division multiplexing , bit error rate , telecommunications , digital signal processing , signal processing , engineering , channel (broadcasting)

We propose the use of pilot-aided (PA) transmission, enabled by single-sideband-subcarrier modulation of both quadratures in the DSP-domain, in single-carrier systems to mitigate jointly laser phase noise and fiber nonlinearity. In addition to tolerance against laser phase noise, we show that the proposed scheme also improves the nonlinear tolerance of both polarization-division-multiplexed (PDM) QPSK and 16-QAM coherent transmission systems by increasing the maximum allowable launch power by 1 dB and 1.5 dB, respectively. The improved nonlinear performance of both systems also manifests itself as an increase in the maximum reach by 720 km and 480 km, respectively. Finally, when digital-to-analog converters (DACs) with lower bit resolutions are used at the transmitter, PA transmission is shown to preserve the same performance improvement over the non-PA case.

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