Related Experiment Video
Updated: Nov 1, 2025
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
8.3K
Rainbow Archimedean spiral emission from optical fibres
F Mangini1, M Ferraro2, M Zitelli2
1Department of Information Engineering (DII), University of Brescia, Via Branze 38, 25123, Brescia, Italy. fabio.mangini@unibs.it.
Scientific Reports
|June 23, 2021
Summary
Researchers created multicolour spiral beams using standard optical fibers and a tilted laser beam. This method enables rainbow color organization and applications in communications and optical tweezers.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Generating complex light beams like spiral beams is crucial for advanced optical applications.
- Existing methods for creating spiral beams can be complex or limited in their output characteristics.
Purpose of the Study:
- To demonstrate a novel and practical method for generating multicolour spiral-shaped light beams.
- To explore the potential of standard optical fibers for creating structured light.
Main Methods:
- Utilizing a standard silica optical fiber.
- Employing a tilted input laser beam to break the fiber's axial symmetry.
- Investigating the effect of input laser power and coupling conditions.
Main Results:
- Successfully generated spiral-shaped beams independent of input laser power.
- Observed a visible supercontinuum spiral emission with a high-power near-infrared femtosecond laser.
- Achieved spatial self-organization of colors into a rainbow distribution by controlling input coupling.
- Demonstrated independence from laser wavelength and polarization.
Conclusions:
- Standard optical fibers can be effectively used to generate multicolour spiral beams.
- The described method offers a practical and versatile approach for structured light generation.
- Potential applications span optical communications, optical tweezers, and quantum optics.
