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Transformation of ring-Airy beams during efficient harmonic generation.

V Yu Fedorov, D G Papazoglou, S Tzortzakis

    Optics Letters
    |June 15, 2019
    PubMed
    Summary

    Ring-Airy beams maintain abrupt autofocusing during harmonic generation, even with pump energy depletion. These beams transform into multiple ring-Airy structures, a phenomenon also observed in the generated harmonic beam.

    Area of Science:

    • Nonlinear Optics
    • Laser Physics
    • Beam Propagation

    Background:

    • Ring-Airy beams exhibit unique autofocusing properties.
    • Harmonic generation is a key process in nonlinear optics.
    • Pump energy depletion can significantly alter beam dynamics.

    Purpose of the Study:

    • To theoretically investigate the evolution of ring-Airy beams during harmonic generation.
    • To analyze beam behavior under pump energy depletion.
    • To understand the transformation of ring-Airy beams and generated harmonics.

    Main Methods:

    • Theoretical study of ring-Airy beam propagation.
    • Numerical simulations of harmonic generation.
    • Development of an analytical model.

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    Main Results:

    • Ring-Airy beams retain abrupt autofocusing despite pump energy depletion.
    • Beams transform into multiple ring-Airy structures.
    • Generated harmonic beams exhibit similar structural transformations.

    Conclusions:

    • The abrupt autofocusing of ring-Airy beams is robust even in the energy depletion regime.
    • A simple analytical model accurately predicts the observed beam transformations.
    • Findings offer insights into nonlinear beam dynamics and harmonic generation.