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Explicit relations and optimal parameters for sidelobe suppression in optical vortices with a modified Bessel

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This study reveals how radial modulation in Bessel-like techniques affects sidelobes. Optimal parameters allow for complete suppression of these unwanted diffraction pattern features.

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Area of Science:

  • Optics and Photonics
  • Diffraction Engineering

Background:

  • Sidelobes in diffraction patterns can degrade optical system performance.
  • Bessel-like modulation techniques offer potential for controlling diffraction characteristics.

Purpose of the Study:

  • To establish explicit relationships between radial modulation and sidelobe expression in Bessel-like modulation.
  • To quantitatively determine structural dimensions influencing sidelobes.
  • To achieve complete sidelobe suppression using optimal modulation parameters.

Main Methods:

  • Analysis of radial modulation effects on Bessel-like phase plates.
  • Quantitative determination of structural dimensions related to sidelobe generation.
  • Optimization of modulation parameters for sidelobe suppression.

Main Results:

  • Explicit relations between radial modulation and sidelobe expression were established.
  • Both central and outer ring areas of the phase plate contribute to sidelobes.
  • Quantitative determination of structural dimensions responsible for sidelobes is possible.

Conclusions:

  • The Bessel-like modulation technique allows for precise control over sidelobe effects.
  • Complete sidelobe suppression is achievable by optimizing radial modulation parameters.
  • This method provides a pathway for enhancing diffraction pattern quality.