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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Published on: January 28, 2019

Phase-only shaping algorithm for Gaussian-apodized Bessel beams.

Charles G Durfee1, John Gemmer, Jerome V Moloney

  • 1Department of Physics, Colorado School of Mines, Golden, CO 80401, USA. cdurfee@mines.edu

Optics Express
|July 12, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created uniform axial intensity profiles for Bessel beams using phase-only wavefront shaping. This technique optimizes the beam

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Area of Science:

  • Optics and Photonics
  • Wavefront Engineering

Background:

  • Bessel beams create Bessel-like axial line foci.
  • Uniform axial intensity along the Bessel zone is desirable for many applications.
  • Achieving uniform intensity profiles has been a challenge in beam shaping.

Purpose of the Study:

  • To demonstrate a method for achieving uniform axial intensity profiles in Bessel beams.
  • To utilize phase-only wavefront shaping for precise control over beam characteristics.

Main Methods:

  • Employing phase-only shaping of the wavefront in the far-field annular ring structure.
  • Using a one-dimensional transform to map radial input fields to axial Bessel fields.
  • Optimizing axial intensity using the Gerchberg-Saxton algorithm with a separated quadratic phase component for faster convergence.

Main Results:

  • Successfully generated Gaussian-apodized Bessel beams with uniform axial intensity profiles.
  • Demonstrated the effectiveness of phase-only wavefront shaping in controlling the axial intensity distribution.
  • Showed that separating the quadratic phase component accelerates the Gerchberg-Saxton algorithm's convergence.

Conclusions:

  • Phase-only wavefront shaping in the far field enables the creation of uniform axial intensity profiles for Bessel beams.
  • The proposed method offers a practical solution for applications requiring controlled axial intensity.
  • The optimization strategy significantly improves the efficiency of achieving the desired beam profile.