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Related Experiment Video

Updated: Jun 4, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

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Published on: January 28, 2019

Reducing the diffraction artifacts while implementing a phase function on a spatial light modulator.

Céline Benoît-Pasanau1, François Goudail, Pierre Chavel

  • 1Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Université Paris-Sud, Campus Polytechnique, Palaiseau, France.

Applied Optics
|February 2, 2011
PubMed
Summary
This summary is machine-generated.

Spatial light modulators (SLMs) can create unwanted diffraction peaks due to pixelation. New nonperiodic and isophase methods eliminate these peaks, replacing them with a smooth halo for improved phase modulation.

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Area of Science:

  • Optics and Photonics
  • Information Technology

Background:

  • Spatial light modulators (SLMs) are crucial for phase modulation.
  • Pixelated nature of SLMs leads to approximated phase functions.
  • Regular sampling in SLMs causes undesirable diffraction peaks.

Purpose of the Study:

  • To theoretically investigate novel pixelation techniques for SLMs.
  • To eliminate diffraction artifacts in phase modulation.
  • To explore alternative methods for implementing optical functions.

Main Methods:

  • Theoretical investigation of two pixelation techniques.
  • Isophase method.
  • A novel nonperiodic method based on Voronoi tessellation.

Main Results:

  • Demonstrated elimination of diffraction peaks with suitable parameter choices.
  • Replaced diffraction peaks with a smoothly varying halo.
  • Showcased the potential for lens function implementation and wavefront correction.

Conclusions:

  • The isophase and Voronoi-derived nonperiodic methods effectively mitigate SLM pixelation artifacts.
  • These techniques offer a pathway to high-fidelity phase modulation.
  • Potential applications include advanced optical component design and adaptive optics.