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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.
© 2021 Optica Publishing Group
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F. Mangini, M. Ferraro, M. Zitelli, A. Niang, T. Mansuryan, A. Tonello, V. Couderc, A. De Luca, S. A. Babin, F. Frezza, and S. Wabnitz, "Helical plasma filaments from the self-channeling of intense femtosecond laser pulses in optical fibers: publisher’s note," Opt. Lett. 47, 1919-1919 (2022)https://opg.optica.org/ol/abstract.cfm?uri=ol-47-7-1919
25 February 2022: A typographical correction was made to the funding section.
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