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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Published on: May 27, 2013

Phase-matched third harmonic generation in microstructured fibers.

Anatoly Efimov, Antoinette Taylor, Fiorenzo Omenetto

    Optics Express
    |May 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    High-delta microstructured fibers enable efficient intermodal phase-matched harmonic generation using femtosecond pulses. This study details third harmonic generation, achieving good agreement between experimental results and theoretical predictions.

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    Area of Science:

    • Nonlinear optics
    • Fiber optics
    • Photonics

    Background:

    • Microstructured fibers offer unique light-guiding properties.
    • Harmonic generation is a key nonlinear optical process.
    • Intermodal phase-matching is crucial for efficient nonlinear processes in multimode fibers.

    Purpose of the Study:

    • To investigate third harmonic generation (THG) in high-delta microstructured fibers.
    • To explore the generation of visible harmonics in distinct transverse modes.
    • To provide a detailed experimental and theoretical analysis of THG, including phase-matching, far-field distributions, and polarization dependence.

    Main Methods:

    • Utilizing femtosecond laser pumping at telecom wavelengths.
    • Employing high-delta microstructured fibers for light propagation.
    • Conducting experimental measurements of harmonic generation.
    • Developing theoretical models to explain the observed phenomena.

    Main Results:

    • Efficient intermodal phase-matched THG was achieved.
    • Visible harmonics were generated in specific transverse modes.
    • Experimental data on phase-matching wavelengths, far-field intensity distributions, and polarization dependence were obtained.
    • Excellent agreement was found between theoretical predictions and experimental outcomes.

    Conclusions:

    • High-delta microstructured fibers are effective for intermodal phase-matched harmonic generation.
    • The study provides a comprehensive understanding of THG in these novel fiber structures.
    • The demonstrated control over harmonic generation in distinct modes opens possibilities for new applications.