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LIU Hong-ying, LUO Bin. Influence of self-steepening effect on focusing property of femtosecond pulsed beam[J]. LASER TECHNOLOGY, 2008, 32(5): 536-538.
Citation: LIU Hong-ying, LUO Bin. Influence of self-steepening effect on focusing property of femtosecond pulsed beam[J]. LASER TECHNOLOGY, 2008, 32(5): 536-538.
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Influence of self-steepening effect on focusing property of femtosecond pulsed beam

  • 1.

    Department of Computer & Communication Engineering, E'mei Campus, Southwest Jiaotong University, E'mei 614202, China;

  • 2.

    School of Information Science & Technology, Southwest Jiaotong University, Chengdu 610031, China

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  • Received Date: June 25, 2007
  • Revised Date: November 05, 2007
  • Published Date: October 24, 2008
    Graphical Abstract
    • Abstract
  • The influence of nonlinear shock on the focusing property of femtosecond pulsed beams was studied through numerical simulation by using the modified(3+1)-dimensional nonlinear Schrodinger equation,taking into account of diffraction effects,space-time coupling,normal dispersion,and cubic nonlinearity.The self-focusing properties of the 90fs pulsed beam were analyzed and discussed in the absence and in presence of shock effect respectively.The results show:The space-time coupling,dispersion,and Kerr effect together will cause the pulse filament,amplitude descending and its width broadening.As implied by the functional form,space-time coupling relates to the dispersion will produce a time shift.The shift increases with distance and dispersion,and that the self-steepening effect will result in the peak power decreasing greatly,moreover it will weak the pulse self-focusing effect.
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    • References (14)
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