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Proceedings Paper

Long plasma channels formed by axicon-focused filaments
Author(s): S. Akturk; B. Zhou; A. Houard; M. Franco; A. Couairon; A. Mysyrowicz
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Paper Abstract

We show that axicon-focusing of ultrashort laser pulses facilitates the generation of filaments with specific spatial profiles in the form of nonlinear Bessel beams. For conditions ensuring that the energy arriving from each Bessel ring is in quasi equilibrium with that absorbed by multiphoton processes, these Bessel filaments generate meter long plasma channels whereas the same pulses focused by a standard lenses generate plasma channels which do not exceed a few centimeters long. Measurements with different lasers show that the length and the homogeneity of the plasma channels are enhanced by the use of large beams and sharp-tip (ideal) axicons whereas blunt-tip axicons induce a lens effect leading to oscillations of the plasma density along the propagation axis.

Paper Details

Date Published: 19 December 2008
PDF: 6 pages
Proc. SPIE 7027, 15th International School on Quantum Electronics: Laser Physics and Applications, 70271E (19 December 2008); doi: 10.1117/12.822527
Show Author Affiliations
S. Akturk, Lab. d'Optique Appliquée, ENSTA, École Polytechnique, CNRS (France)
B. Zhou, Lab. d'Optique Appliquée, ENSTA, École Polytechnique, CNRS (France)
A. Houard, Lab. d'Optique Appliquée, ENSTA, École Polytechnique, CNRS (France)
M. Franco, Lab. d'Optique Appliquée, ENSTA, École Polytechnique, CNRS (France)
A. Couairon, Ctr. de Physique Théorique, CNRS, École Polytechnique (France)
A. Mysyrowicz, Lab. d'Optique Appliquée, ENSTA, École Polytechnique, CNRS (France)


Published in SPIE Proceedings Vol. 7027:
15th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Elena Taskova; Ekaterina Borisova; Alexander Serafetinides, Editor(s)

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