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Related Experiment Video

Updated: Jul 31, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Generation of extremely high-angle Bessel beams.

Valeria V Belloni, Luc Froehly, Cyril Billet

|May 3, 2023

Summary

We developed a compact setup using a half-ball lens and relay lens to create tightly focused Bessel beams. This method is simpler than traditional axicon imaging, enabling precise beam generation for various applications.

Area of Science:

Optics and Photonics
Laser Physics

Background:

Bessel beams are non-diffracting light beams with unique propagation characteristics.
Generating tightly focused Bessel beams typically requires complex optical setups like axicons.

Purpose of the Study:

To present a simple and compact optical setup for generating tightly focused Bessel beams.
To analyze the impact of optical element misalignment on Bessel beam quality.

Main Methods:

Utilizing a half-ball lens coupled with a relay lens to form the Bessel beam.
Experimental generation and characterization of the Bessel beam at 980 nm.
Numerical simulations to study the effects of tilt and shift misalignment.

Main Results:

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Last Updated: Jul 31, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Published on: August 12, 2013

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Successfully generated a Bessel beam with a 42° cone angle, 500 µm beam length, and 550 nm core radius.

Identified acceptable ranges of tilt and shift for maintaining beam regularity.

Demonstrated a compact and simplified alternative to conventional axicon-based systems.

Conclusions:

The proposed half-ball lens and relay lens system offers a practical and efficient method for Bessel beam generation.
The study provides valuable insights into the tolerance of optical misalignments for robust Bessel beam production.