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Wavefront reconstruction of a non-diffracting structured laser beam
Optics Express
|December 13, 2023
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).
- 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.
