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    Area of Science:

    • Laser Physics and Optics
    • Materials Science and Engineering
    • Computational Physics

    Background:

    • Laser-based in-bulk material processing is advancing, requiring precise understanding of laser propagation and volumetric field distribution.
    • Existing simulation software often needs customization, and experimental validation of laser focus is crucial for accurate modeling.
    • Accurate knowledge of laser field distribution is essential for developing new scientific and industrial applications.

    Purpose of the Study:

    • To present a high-precision method for measuring laser field distribution near the focus.
    • To release an in-house software, InFocus, for fast vectorial analysis of focused volumetric fields.
    • To provide a tool for evaluating assumptions in laser propagation simulations and optimizing energy deposition.

    Main Methods:

    • Developed a novel high-precision measurement technique yielding 300 nm longitudinal and diffraction-limited lateral resolution.
    • Created the open-source InFocus software for vectorial analysis of focused laser fields in bulk materials.
    • Validated simulations against propagation imaging experiments, accounting for aberrations from refractive index mismatch and optics.

    Main Results:

    • The InFocus software enables rapid vectorial analysis of volumetric laser field distributions.
    • Simulations accurately predict light propagation under various conditions, showing excellent agreement with experimental data.
    • The developed model effectively accounts for optical aberrations, confirming its suitability for precise energy deposition evaluation.

    Conclusions:

    • The presented high-precision measurement method and InFocus software significantly advance the understanding of laser propagation.
    • This integrated approach facilitates the development and optimization of in-bulk laser material processing.
    • The open-source release under Creative Commons 4.0 license promotes wider scientific and industrial adoption.