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Suitable state bases for nonlinear optical mode conversion protocols.

D G Pires, J C A Rocha, A J Jesus-Silva

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    |July 16, 2020
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    Summary
    This summary is machine-generated.

    Hermite-Gaussian (HG) modes are more suitable for optical mode conversion than Laguerre-Gaussian (LG) modes. This is due to a clear rule for dominant mode selection in nonlinear mixing, unlike with LG modes.

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    Area of Science:

    • Optics and Photonics
    • Quantum Optics
    • Nonlinear Optics

    Background:

    • Laguerre-Gaussian (LG) and Hermite-Gaussian (HG) beams are fundamental modes in optical systems.
    • Optical mode conversion is crucial for various applications, including optical communications and laser technologies.
    • Understanding the suitability of different basis modes is essential for efficient optical manipulation.

    Purpose of the Study:

    • To compare the suitability of Hermite-Gaussian (HG) and Laguerre-Gaussian (LG) modes as basis sets for optical mode conversion.
    • To establish a clear rule for dominant mode selection in nonlinear optical processes involving HG and LG beams.
    • To experimentally and theoretically demonstrate optical modal conversion using both HG and LG input beams.

    Main Methods:

    • Theoretical analysis of normalized overlap integrals between different optical modes.
    • Experimental demonstration of nonlinear optical mixing using HG and LG input beams.
    • Characterization of generated modes to identify dominant modes and conversion efficiencies.

    Main Results:

    • Hermite-Gaussian (HG) modes provide a more suitable basis for optical mode conversion compared to Laguerre-Gaussian (LG) modes.
    • A clear and predictable rule for dominant mode selection was determined for nonlinear mixing of HG beams.
    • The same clear rule for dominant mode selection could not be established for LG beams.
    • Successful demonstrations of optical modal conversion were achieved using both HG and LG input modes.

    Conclusions:

    • HG modes offer superior predictability and suitability for optical mode conversion, particularly in nonlinear mixing scenarios.
    • The established rule for HG mode mixing simplifies the design and optimization of optical converters.
    • Further research can explore advanced applications leveraging the advantages of HG modes in optical mode conversion.