Spatiotemporal transformation of a focused femtosecond pulse in the absence of self-focusing
Optics Letters, Vol. 31, Issue 6, pp. 832-834 (2006)
http://dx.doi.org/10.1364/OL.31.000832
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Abstract
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
History
Original Manuscript: November 2, 2005
Manuscript Accepted: November 17, 2005
Citation
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)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-6-832
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