Journal
OPTICS COMMUNICATIONS
Volume 191, Issue 3-6, Pages 353-362Publisher
ELSEVIER
DOI: 10.1016/S0030-4018(01)01113-0
Keywords
nonlinear optics; beam trapping and self-focusing; photoionization; nonlinear phenomena : wave; propagation and other interactions; continuum generation
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We present numerical results on the propagation of femtosecond pulses in air including multiphoton ionization. group-velocity dispersion, space-time focusing, self-steepening, Raman response. and higher-order chi ((5)) defocusing. It is shown that the self-steepening terms cause strong blue shifting of the spectrum generating a white-light continuum. Our results are in good qualitative agreement with experimental observations. (C) 2001 Elsevier Science B.V. All rights reserved.
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