Abstract

We concede the point raised by Tosa and Nam regarding the interpretation of our recent measurements of intense laser pulse dynamics. Although the measured fluence shows a double focus that is suggestive of filamentation, pulse-propagation simulations show no resurgence in intensity at the second beam waist. An interplay between the generation of plasma and natural diffraction of the apertured beam gives rise to this unusual behavior without requiring a sizable n2.

© 2007 Optical Society of America

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References

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  1. V. Tosa, E. Takahashi, Y. Nabekawa, and K. Midorikawa, Phys. Rev. A 67, 063817 (2003).
    [CrossRef]
  2. V. Tosa and C. H. Nam, Opt. Lett. 32, 2707 (2007).
    [CrossRef] [PubMed]
  3. J. C. Painter, M. Adams, N. Brimhall, E. Christenser, G. Giraud, N. Powers, M. Turner, M. Ware, and J. Peatross, Opt. Lett. 31, 3471 (2007).
    [CrossRef]
  4. N. Brimhall, J. C. Painter, N. Powers, G. Giraud, M. Turner, M. Ware, J. Peatross, Opt. Express 15, 1684 (2007).
    [CrossRef] [PubMed]
  5. A. Chiron, B. Lamouroux, R. Lange, J.-F. Ripoche, M. Franco, B. Prade, G. Bonnaud, G. Riazuelo, and A. Mysyrowicz, Eur. Phys. J. D 6, 383-396 (1999).
    [CrossRef]

2007

2003

V. Tosa, E. Takahashi, Y. Nabekawa, and K. Midorikawa, Phys. Rev. A 67, 063817 (2003).
[CrossRef]

1999

A. Chiron, B. Lamouroux, R. Lange, J.-F. Ripoche, M. Franco, B. Prade, G. Bonnaud, G. Riazuelo, and A. Mysyrowicz, Eur. Phys. J. D 6, 383-396 (1999).
[CrossRef]

Eur. Phys. J. D

A. Chiron, B. Lamouroux, R. Lange, J.-F. Ripoche, M. Franco, B. Prade, G. Bonnaud, G. Riazuelo, and A. Mysyrowicz, Eur. Phys. J. D 6, 383-396 (1999).
[CrossRef]

Opt. Express

Opt. Lett.

Phys. Rev. A

V. Tosa, E. Takahashi, Y. Nabekawa, and K. Midorikawa, Phys. Rev. A 67, 063817 (2003).
[CrossRef]

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Figures (2)

Fig. 1
Fig. 1

Snapshot of a 5 mJ , 30 fs laser pulse propagating in 80   Torr of He at the focus of a 1 m focal-length mirror. A partially closed aperture defines f 125 focusing.

Fig. 2
Fig. 2

Beam fluence as a function of radial and propagation distance near the focus for the pulse seen in Fig. 1.

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