@article{b98d9f7294164dda91dc43c4777eb9e0,
title = "Helical plasma filaments from the self-channeling of intense femtosecond laser pulses in optical fibers",
abstract = "We experimentally and numerically study the ignition of helical-shaped plasma filaments in standard optical fibers. Femtosecond pulses with megawatt peak power with proper off-axis and tilted coupling in the fiber core produce plasma skew rays. These last for distances as long as 1000 wavelengths thanks to a combination of linear waveguiding and the self-channeling effect. Peculiar is the case of graded-index multimode fibers; here the spatial self-imaging places constraints on the helix pitch. These results may find applications for fabricating fibers with helical-shaped core micro-structuration as well as for designing laser components and three-dimensional optical memories.",
author = "F. Mangini and M. Ferraro and M. Zitelli and A. Niang and T. Mansuryan and A. Tonello and V. Couderc and {de Luca}, A. and Babin, {S. A.} and F. Frezza and S. Wabnitz",
note = "Funding Information: Funding. 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 Foundation for Basic Research (18-52-7822); Agence Nationale de la Recherche (ANR-10-LABX-0074-01, ANR-18-CE080016-01); Russian Science Foundation (21-72-30024). Acknowledgments. We acknowledge the support of CILAS Company (ArianeGroup, X-LAS laboratory) and “R{\'e}gion Nouvelle Aquitaine” (F2MH and Nematum). Disclosures. The authors declare no conflict of interest. Data availability. Data underlying the results presented in this Letter are not publicly available at this time but may be obtained from the authors upon reasonable request. Publisher Copyright: {\textcopyright} 2021 Optica Publishing Group",
year = "2022",
month = jan,
day = "1",
doi = "10.1364/OL.445321",
language = "English",
volume = "47",
pages = "1--4",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "The Optical Society",
number = "1",
}