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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Related Experiment Video

Updated: Jul 8, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Wavefront reconstruction of a non-diffracting structured laser beam.

Martin Dusek, Jean-Christophe Gayde, Miroslav Sulc

    Optics Express
    |December 13, 2023
    PubMed
    Summary

    Structured Laser Beams (SLBs) offer precise long-distance alignment. A new AI-driven method analyzes single-intensity distributions to accurately assess wavefront aberrations in SLB generators.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Metrology

    Background:

    • Structured Laser Beams (SLBs) exhibit pseudo-non-diffracting properties, similar to Bessel beams.
    • SLBs theoretically propagate indefinitely with minimal divergence (0.01 mrad), ideal for long-distance alignment.
    • Applications include precise alignment of particle accelerator components, such as those at CERN.

    Purpose of the Study:

    • To present a novel method for assessing symmetrical wavefront aberrations in SLB generators.
    • To develop an efficient technique for analyzing optical quality in SLB systems.

    Main Methods:

    • Analysis of a single-intensity distribution of a Structured Laser Beam.
    • Estimation of Zernike polynomial coefficients using artificial intelligence (AI).

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  • Refinement of results using least-squares fitting to avoid local minima.

    • Main Results:

    • Successful estimation of Zernike polynomial coefficients from a single SLB intensity profile.
    • Demonstration of an AI-enhanced method for aberration analysis in SLB systems.
    • Validation of a robust fitting procedure that circumvents local minima.

    Conclusions:

    • The developed method provides a novel and effective way to analyze optical aberrations in SLB generators.
    • This technique enhances the precision and reliability of SLB-based alignment systems.
    • The AI-driven approach offers a significant advancement in optical metrology for laser beam characterization.