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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 6 — Mar. 15, 2006
  • pp: 832–834

Spatiotemporal transformation of a focused femtosecond pulse in the absence of self-focusing

Yi Liu, Hongbing Jiang, and Qihuang Gong  »View Author Affiliations

Optics Letters, Vol. 31, Issue 6, pp. 832-834 (2006)

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The spatiotemporal transformation of a focused femtosecond pulse in fused silica at power much less than the critical power for self-focusing was numerically studied. We found that the pulse experiences unusual spatiotemporal reshaping, such as refocusing of the near-axis portion of the defocused pulse tail, even when the self-focusing effect was not taken into the calculation. Further studies revealed that a tubelike spatiotemporal distribution of the plasma is formed during pulse propagation and that it plays a decisive role in the transformations of the pulse. In addition, the tubelike plasma was found to exist universally under different external focusing conditions if the input pulse had sufficient power.

© 2006 Optical Society of America

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(190.5940) Nonlinear optics : Self-action effects
(260.5210) Physical optics : Photoionization
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Ultrafast Optics

Original Manuscript: November 2, 2005
Manuscript Accepted: November 17, 2005

Yi Liu, Hongbing Jiang, and Qihuang Gong, "Spatiotemporal transformation of a focused femtosecond pulse in the absence of self-focusing," Opt. Lett. 31, 832-834 (2006)

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