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Updated: Jan 4, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Analysis of nonlinearity mitigation using phase-sensitive optical parametric amplifiers.

Benjamin Foo, Magnus Karlsson, Kovendhan Vijayan

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    |November 6, 2019
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    Summary
    This summary is machine-generated.

    Phase-sensitive optical parametric amplifiers (PSAs) reduce nonlinear distortions. A modified Volterra nonlinear equalizer (VNLE) further mitigates residual distortions, extending transmission distances by up to 80% in optical communication links.

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    Area of Science:

    • Optical Communications
    • Nonlinear Optics
    • Signal Processing

    Background:

    • Phase-sensitive optical parametric amplifiers (PSAs) offer low-noise amplification and Kerr effect nonlinearity mitigation.
    • Imperfect link parameters in PSA-based systems lead to residual nonlinear distortions.
    • Effective mitigation of these residual distortions is crucial for advanced optical networks.

    Purpose of the Study:

    • To theoretically describe residual nonlinear distortions in PSA-based optical links.
    • To develop a receiver-based mitigation technique for these residual distortions.
    • To experimentally validate the proposed mitigation method.

    Main Methods:

    • Utilized first-order perturbation theory to model residual nonlinear distortions.
    • Developed a modified third-order Volterra nonlinear equalizer (VNLE) for the receiver.
    • Conducted numerical simulations and a proof-of-concept experiment.

    Main Results:

    • The modified VNLE effectively reduces residual nonlinear distortions in links with in-line PSAs.
    • Simulations showed potential for increasing maximum transmission distance by up to 80%.
    • Experimental validation confirmed mitigation of residual distortions for a 10-Gbaud 16QAM signal.

    Conclusions:

    • The proposed modified VNLE is a viable solution for mitigating residual nonlinear distortions in PSA-based optical systems.
    • This approach enhances the performance and extends the reach of optical communication links.
    • The findings are applicable to various symbol rates and modulation formats.