Rainbow Archimedean spiral emission from optical fibres

We demonstrate a new practical approach for generating multicolour spiral-shaped beams. It makes use of a standard silica optical fibre, combined with a tilted input laser beam. The resulting breaking of the fibre axial symmetry leads to the propagation of a helical beam. The associated output far-f...

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Bibliographic Details
Published in:Scientific reports 2021-06, Vol.11 (1), p.13030-13030, Article 13030
Main Authors: Mangini, F., Ferraro, M., Zitelli, M., Kalashnikov, V., Niang, A., Mansuryan, T., Frezza, F., Tonello, A., Couderc, V., Aceves, A. B., Wabnitz, S.
Format: Article
Language:English
Subjects:
639/624
639/624/1075
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Emissions
Fibers
Humanities and Social Sciences
Lasers
multidisciplinary
Optics
Science
Science (multidisciplinary)
Silica
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Summary:We demonstrate a new practical approach for generating multicolour spiral-shaped beams. It makes use of a standard silica optical fibre, combined with a tilted input laser beam. The resulting breaking of the fibre axial symmetry leads to the propagation of a helical beam. The associated output far-field has a spiral shape, independently of the input laser power value. Whereas, with a high-power near-infrared femtosecond laser, a visible supercontinuum spiral emission is generated. With appropriate control of the input laser coupling conditions, the colours of the spiral spatially self-organize in a rainbow distribution. Our method is independent of the laser source wavelength and polarization. Therefore, standard optical fibres may be used for generating spiral beams in many applications, ranging from communications to optical tweezers and quantum optics.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-92313-w