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Related Experiment Video

Updated: Mar 18, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Coherent OAM generation from discrete chaotic phase surfaces.

Netzer Moriya1

  • 1siOnet - Applied Modeling Research, Edison, US. netzer@si-o-net.com.

Scientific Reports
|March 17, 2026
PubMed
Summary
This summary is machine-generated.

We show how to generate controlled orbital angular momentum (OAM) from chaotic light patterns. This method uses discrete phase biases for precise OAM control, advancing optical communications and sensing.

Keywords:
MetasurfacesOrbital angular momentumPhase screensSpatial light modulatorsStatistical opticsStructured light

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Area of Science:

  • Optics and Photonics
  • Quantum Information
  • Statistical Optics

Background:

  • Orbital angular momentum (OAM) is a key property of light.
  • Generating OAM from chaotic sources is challenging.
  • Controlling OAM states is crucial for advanced optical applications.

Purpose of the Study:

  • To demonstrate coherent OAM generation from chaotic phase screens.
  • To establish selection rules for OAM generation based on phase statistics.
  • To explore applications in optical communications and sensing.

Main Methods:

  • Fourier analysis of ensemble-averaged complex phase factors.
  • Monte Carlo simulations to validate theoretical predictions.
  • Investigation of discrete and continuous azimuthal bias effects.

Main Results:

  • Coherent OAM generation is linked to integer Fourier coefficients of the phase factor.
  • Discretized Gaussian bias leads to exponential power profiles.
  • Continuous bias results in sinc-filtered spectra with algebraic decay.
  • Simulations confirm suppression of forbidden OAM levels and high correlation with theory.

Conclusions:

  • Discrete statistical structures enable deterministic OAM control.
  • The findings have direct applications in spatial light modulators and metasurfaces.
  • Coherent selection extends to vector beams and enables time-multiplexed filters without added hardware.