@inproceedings{cc5833a2d6b346b9b18e688919e4b1c8,
title = "Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments",
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.",
keywords = "laser damages, Multimode fibers, multiphoton ionization, optical breakdown, plasma filaments",
author = "Mario Ferraro and Fabio Mangini and Mario Zitelli and Alioune Niang and Rocco Crescenzi and Tigran Mansuryan and Alessandro Tonello and Vincent Couderc and {De Luca}, Antonio and Babin, {Sergey A.} and Fabrizio Frezza and Stefan Wabnitz",
note = "Funding Information: We acknowledge the financial support of the following grants: Horizon 2020 EU programme via the European Research Council Advanced Research Grant (740355); Ministero dell{\textquoteright}Istruzione, dell{\textquoteright}Universit{\`a} e della Ricerca (R18SPB8227); Ministry of Education and Science of the Russian Federation (14.Y26.31.0017); Russian Science Foundation (21-72-30024); Agence Nationale de la Recherche (ANR-10-LABX-0074-01, ANR-18-CE080016-01). Publisher Copyright: {\textcopyright} 2022 SPIE.; Nonlinear Optics and its Applications 2022 ; Conference date: 09-05-2022 Through 20-05-2022",
year = "2022",
doi = "10.1117/12.2624477",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Broderick, {Neil G. R.} and Dudley, {John M.} and Peacock, {Anna C.}",
booktitle = "Nonlinear Optics and its Applications 2022",
address = "United States",
}