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Iterative processing of second-order optical nonlinearity depth profiles.

A Ozcan, M Digonnet, G Kino

    Optics Express
    |June 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

    The Fienup algorithm accurately retrieves nonlinearity profiles from Maker-fringe curves for nonlinear optical materials. This method enhances data processing for crystalline, organic, and poled silica samples.

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    Area of Science:

    • Nonlinear optics
    • Materials science
    • Computational physics

    Background:

    • Maker-fringe measurements are crucial for characterizing nonlinear optical properties.
    • Retrieving accurate nonlinearity profiles from experimental data can be challenging.
    • Existing methods like inverse Fourier transform may have limitations.

    Purpose of the Study:

    • To demonstrate the efficacy of the Fienup algorithm for processing Maker-fringe data.
    • To retrieve the nonlinearity profile of nonlinear optical materials.
    • To assess the algorithm's accuracy and applicability to various material types.

    Main Methods:

    • Numerical simulations were performed to test the Fienup algorithm.
    • Experimental Maker-fringe data from nonlinear samples were processed.
    • The Fienup algorithm was applied iteratively to the measured curves.

    Main Results:

    • The Fienup algorithm accurately retrieved nonlinearity profiles from simulated and experimental data.
    • High accuracy was achieved for profiles with one or two dominant peaks.
    • The algorithm proved effective for crystalline, organic, and poled silica nonlinear films.

    Conclusions:

    • The Fienup algorithm offers a fast, simple, and accurate method for nonlinearity profile retrieval.
    • This technique is broadly applicable to various nonlinear optical materials.
    • The Fienup algorithm can improve upon existing inverse Fourier transform methods.