Nonlinearity compensation using optical phase conjugation deployed in discretely amplified transmission systems

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We introduce a closed form equation, validated by simulations and experimental
results, that predicts the residual nonlinear noise ratio in mid-link OPC assisted discretely amplified systems. The model anticipates the reduction in performance enhancement achieved by mid-link OPC as the bandwidth of the modulated signals increases. The numerical analysis shows that uncompensated signal-signal interactions limit the performance improvement achieved by the introduction of additional OPCs. The numerical analysis predicts that the deployment of shorter amplifier spacing will lead to a greater performance enhancement. The numerical results are validated by experimentally testing of 2x, 4x, and 8x28Gbaud PM-QPSK systems with mid-link OPC compensation in a discretely amplified system with 100km amplifier spacing. The experimentally obtained reach enhancement (43%, 32%, and 24% for 2x28Gbaud, 4x28Gbaud, and 8x28Gbaud, respectively) confirms that the compensation efficiency of mid-link OPC is highly dependent on the number of channels (bandwidth) propagating along the system.

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  • Nonlinearity compensation using optical

    Rights statement: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

    Accepted author manuscript, 2 MB, PDF-document

    Embargo ends: 1/01/50


Original languageEnglish
JournalOptics Express
StateAccepted/In press - 6 Aug 2018

Bibliographic note

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Funding: EPSRC EP/J017582/1 [UNLOC]; EP/L000091/1; H2020 659950 [INVENTION].


  • Optical communications, Phase conjugation, Nonlinear optics, Fibers

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