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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
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Long focusing range and self-healing Bessel vortex beam generator.
Optics Letters
|May 2, 2020
Summary
A new continuous axial-spiral phase microplate (CAsPP) generates high-quality Bessel vortex beams. This compact optical component offers controllable focus and self-healing properties for advanced applications.
Area of Science:
- Optics and Photonics
- Micro-optics
- Beam Shaping
Background:
- Generating higher-order Bessel vortex beams is crucial for applications like optical trapping and laser machining.
- Existing methods often involve bulky or complex optical setups.
Purpose of the Study:
- To propose and demonstrate a novel compact optical component for generating high-quality higher-order Bessel vortex beams.
- To investigate the focusing and self-healing properties of the proposed component.
Main Methods:
- Fabrication of a continuous axial-spiral phase microplate (CAsPP) using femtosecond laser direct writing.
- Experimental and simulation-based characterization of the generated Bessel vortex beams.
- Analysis of the microplate's focusing range and self-healing capabilities.
Main Results:
- The CAsPP, with an 80 µm diameter, successfully generated high-quality higher-order Bessel vortex beams.
- A controllable long focus ranging from 50 to 600 µm was achieved.
- The generated beams exhibited good self-healing properties after propagation.
Conclusions:
- The developed CAsPP is a compact and effective component for generating Bessel vortex beams.
- The demonstrated properties open new avenues for integrated optics, optical trapping, and laser machining.
