4 × 160-Gbit/s multi-channel regeneration in a single fiber

Ju Wang, Hua Ji, Hao Hu, Jinlong Yu, Hans Christian Hansen Mulvad, Michael Galili, Palle Jeppesen, Leif Katsuo Oxenløwe

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    Abstract

    Simultaneous regeneration of four high-speed (160 Gbit/s) wavelength-division multiplexed (WDM) and polarization-division multiplexed (PDM) signals in a single highly nonlinear fiber (HNLF) is demonstrated. The regeneration operation is based on four-wave mixing in HNLF, where the degraded data signals are applied as the pump. As a result, the noise on both '0' and '1' levels can be suppressed simultaneously in our scheme. The stimulated Brillouin scattering (SBS) from the continuous wave (CW) is suppressed by cross-phase modulation (XPM) from the data pump, relieving the requirement of external phase modulation of the CW light. Mitigation of the inter-channel nonlinearities is achieved mainly through an inter-channel 0.5 bit slot time delay. Bidirectional propagation is also applied to relieve the inter-channel four-wave mixing. The multi-channel regeneration performance is validated by bit-error rate (BER) measurements. The receiver powers at the BER of 10-9 are improved by 1.9 dB, 1.8 dB, 1.6 dB and 1.5 dB for the four data channels, respectively. © 2014 Optical Society of America.
    Original languageEnglish
    JournalOptics Express
    Volume22
    Issue number10
    Pages (from-to)11456-11464
    ISSN1094-4087
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Four wave mixing
    • Phase modulation
    • Continuous waves
    • Cross-phase modulations
    • Data channels
    • Data signals
    • Highly nonlinear fiber(HNLF)
    • Regeneration performance
    • Stimulated Brillouin Scattering (SBS)
    • Wave length division multiplexed (WDM)
    • Multiplexing

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