Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments

Mario Ferraro; Fabio Mangini; Mario Zitelli; Alioune Niang; Rocco Crescenzi; Tigran Mansuryan; Alessandro Tonello; Vincent Couderc; Antonio De Luca; Sergey A. Babin; Fabrizio Frezza; Stefan Wabnitz

doi:10.1117/12.2624477

25 May 2022 Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments

Mario Ferraro, Fabio Mangini, Mario Zitelli, Alioune Niang, Rocco Crescenzi, Tigran Mansuryan, Alessandro Tonello, Vincent Couderc, Antonio De Luca, Sergey A. Babin, Fabrizio Frezza, Stefan Wabnitz

Author Affiliations +

Proceedings Volume 12143, Nonlinear Optics and its Applications 2022; 1214302 (2022) https://doi.org/10.1117/12.2624477
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

The self-channeling of extremely high power laser beams permits the ignition of plasma filaments in dielectrics, such as air and glasses. If no constraints are imposed by the geometry of the material, the plasma appears as a straight bright line. Here, we show that plasma filaments may be ignited in the vicinity of the interface between two materials in optical fibers, i.e., either the core-cladding or the cladding-air interface. In the latter case, helical plasma filaments lead to the emission of rainbow spiral beams. In perspective, our results may pave the way to a novel approach for micro-structuring optical fibers, and for generating light beams with orbital angular momentum.

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Mario Ferraro, Fabio Mangini, Mario Zitelli, Alioune Niang, Rocco Crescenzi, Tigran Mansuryan, Alessandro Tonello, Vincent Couderc, Antonio De Luca, Sergey A. Babin, Fabrizio Frezza, and Stefan Wabnitz "Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments", Proc. SPIE 12143, Nonlinear Optics and its Applications 2022, 1214302 (25 May 2022); https://doi.org/10.1117/12.2624477

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