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.

Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments / Ferraro, M.; Mangini, F.; Zitelli, M.; Niang, A.; Crescenzi, R.; Mansuryan, T.; Tonello, A.; Couderc, V.; De Luca, A.; Babin, S. A.; Frezza, F.; Wabnitz, S.. - 12143:(2022), p. 13. (Intervento presentato al convegno SPIE Photonics Europe tenutosi a Strasburgo, Francia) [10.1117/12.2624477].

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

Ferraro M.;Mangini F.;Zitelli M.;Niang A.;Crescenzi R.;Frezza F.;Wabnitz S.
2022

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.
2022
SPIE Photonics Europe
optical fibers; nonlinear optics; optical solitons; Kerr effect; four wave mixing
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Exploiting the geometry of optical fibers for igniting helical-shape plasma filaments / Ferraro, M.; Mangini, F.; Zitelli, M.; Niang, A.; Crescenzi, R.; Mansuryan, T.; Tonello, A.; Couderc, V.; De Luca, A.; Babin, S. A.; Frezza, F.; Wabnitz, S.. - 12143:(2022), p. 13. (Intervento presentato al convegno SPIE Photonics Europe tenutosi a Strasburgo, Francia) [10.1117/12.2624477].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1652944
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