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Scientific article
Open access
English

Multiple filamentation of non-uniformly focused ultrashort laser pulses

Published inApplied physics. B, Lasers and optics, vol. 94, no. 2, p. 243-247
Collection
  • Open Access - Licence nationale Springer
Publication date2009
Abstract

We propose the impingement of non-uniform wavefront curvature as a simple way to improve the longitudinal homogeneity of the plasma density along filaments generated by ultrashort laser pulses. We characterize multiple filamentation of a multiterawatt beam with different wavefront curvatures applied to specific regions in the transverse beam profile. In adequate conditions, the filamenting region is more homogeneously ionized, in the longitudinal direction, than in the case of uniform focusing. Moreover, the ionization maximum is located between the middle and the two thirds of the filaments in all investigated chirps and focus configurations.

Citation (ISO format)
HAO, Z. Q. et al. Multiple filamentation of non-uniformly focused ultrashort laser pulses. In: Applied physics. B, Lasers and optics, 2009, vol. 94, n° 2, p. 243–247. doi: 10.1007/s00340-008-3328-4
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ISSN of the journal0946-2171
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