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Updated: Jul 18, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Variable Bessel Beam Profiles Generated through Refraction by Liquid Media.

Dina C Palangyos1,2, Raphael A Guerrero1

  • 1Department of Physics, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, Quezon City 1108, Philippines.

Micromachines
|August 26, 2023
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Summary
This summary is machine-generated.

Researchers created tunable Bessel beams (BBs) using a modified axicon and liquid-filled chamber. This novel method overcomes limitations of traditional axicons, allowing control over BB intensity profiles while preserving their unique non-diffracting properties.

Keywords:
Bessel beamaxiconcore diameterliquidsrefraction

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Beam Shaping Technologies

Background:

  • Axicon-based techniques are efficient for generating Bessel beams (BBs).
  • Traditional axicons suffer from manufacturing defects and limited tunability.
  • Controlling BB intensity profiles is crucial for advanced optical applications.

Purpose of the Study:

  • To develop a method for generating variable Bessel beam intensity profiles.
  • To overcome the limitations of conventional axicon manufacturing and tunability.
  • To investigate the use of liquid media for dynamic BB modification.

Main Methods:

  • Utilized a blunt-tip axicon combined with a custom fluid chamber.
  • Employed various liquid media to alter beam refraction and effective optical path.
  • Magnified the output Bessel beams using a telescope system for analysis.

Main Results:

  • Successfully generated tunable Bessel beam intensity profiles by varying liquid media.
  • Observed an increase in Bessel beam core diameter with different refractive index fluids.
  • Demonstrated that modified Bessel beams retain non-diffraction and self-healing properties.

Conclusions:

  • The combination of a modified axicon and a liquid chamber provides a flexible method for tuning Bessel beams.
  • This approach offers a practical solution for overcoming limitations of fixed-geometry axicons.
  • The technique preserves the essential characteristics of Bessel beams, enabling new applications in optical manipulation and imaging.