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Nonlinear imaging in photonic lattices.

Nikolaos K Efremidis, Mihalis Mparkas

    Optics Letters
    |January 7, 2017
    PubMed
    Summary

    Nonlinear imaging is achievable in periodic waveguide setups using two nonlinear media segments with opposing Kerr nonlinearity signs. This method enables effective reverse propagation and precise control over coupling coefficients for advanced imaging applications.

    Area of Science:

    • Photonics and Optical Physics
    • Nonlinear Optics
    • Waveguide Optics

    Background:

    • Nonlinear imaging offers advanced capabilities beyond linear methods.
    • Periodic waveguide structures are fundamental in integrated optics.
    • Achieving high-fidelity nonlinear imaging in such systems presents challenges.

    Purpose of the Study:

    • To demonstrate the feasibility of nonlinear imaging in periodic waveguide configurations.
    • To introduce a novel approach using segments with opposite Kerr nonlinearity signs.
    • To explore the role of coupling coefficient control in nonlinear imaging.

    Main Methods:

    • Utilizing two distinct nonlinear media segments with opposite Kerr nonlinearity.
    • Implementing effective 'reverse propagation' using the second nonlinear medium.

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  • Numerically testing the proposed method in 1D and 2D square waveguide arrays.

    • Main Results:

    • Nonlinear imaging is shown to be possible in periodic waveguides under specific conditions.
    • The method relies on controlling the sign and amplitude of the coupling coefficient.
    • Successful numerical validation in both one- and two-dimensional configurations.

    Conclusions:

    • The proposed technique enables nonlinear imaging in periodic waveguides.
    • Oppositely signed nonlinear media and coupling control are key ingredients.
    • This work opens avenues for advanced optical imaging and manipulation in integrated systems.