Self-Guiding without Focusing Nonlinearity: Leaking Mode Self-Effect Due to Field-Induced Saturable Ionization

  • A. M. Sergeev
  • M. Lontano
  • M. D. Chernobrovtseva
  • A. V. Kim

Abstract

Creation of elongated plasma structures for guiding of powerful ultra-short laser pulses is a challenging scientific problem and an important application in the area of superstrong field interaction with matter. Self-channeling regimes recently observed in experiments1-4 have been attributed to the focusing nature of relativistic and Kerr nonlinearities that cause an increase of the refractive index and deviation of light rays toward stronger field regions. In the case of gas ionization at the axis of a Kerr-effect induced waveguide3-5 the influence of focusing nonlinearity should be especially strong since it is not only to prevent the divergence of rays due to linear diffraction but also to balance refraction of radiation from the axis, that is caused by emerging plasma. Experimentally observed extra-long waveguides produced by few mi, 100 fs laser pulses at ionization of atmospheric air3,4 have been interpreted as plasma structures having a core where the ionization nonlinearity prevails and an outer cladding where the dominating Kerr nonlinearity generates opposite-in-sign positive variations of the refractive index and hence keeps the radiation from divergence.

Keywords

Laser Pulse Ultrashort Laser Pulse Plasma Channel Kerr Nonlinearity Rayleigh Length 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. Sullivan, H. Hamster, S.P.Gordon et al., Propagation of intense, ultrashort laser pulses in plasmas, Opt.Lett., 19: 1544 (1994).ADSCrossRefGoogle Scholar
  2. 2.
    A.B. Borisov et al., JOSA B, 11: 1941 (1994).ADSCrossRefGoogle Scholar
  3. 3.
    A. Braun G. Korn, X. Liu et al.,Self-channeling of high-peak-power femtosecond laser pulses in air, Opt.Lett., 20: 73 (1995).ADSCrossRefGoogle Scholar
  4. 4.
    E.T.J. Nibbering, P.F. Curley, G. Grillon et al., Conical emission from self-guided femtosecond pulses in air, Opt.Lett., 21: 62 (1996).ADSCrossRefGoogle Scholar
  5. 5.
    D. Anderson, A.V. Kim, M. Lisak et al., Self-sustained plasma waveguide structures produced by ionizing laser radiation in a dense gas, Phys.Rev.E 52: 4564 (1995).ADSCrossRefGoogle Scholar
  6. 6.
    A.A. Babine, A.V. Kim, A.M. Kiselev et al., Interaction of superstrong laser fields with matter: effects and applications, Izv. VUSov Radioßzika, 39: 713 (1996).Google Scholar
  7. 7.
    N.B. Delone and V.P. Krainov, Multiphoton Processes in Atoms, Springer, Berlin (1994).CrossRefGoogle Scholar
  8. 8.
    W.M. Wood, G.B. Focht, and M.C.Downer, Tight focusing and blue shifting of millijoule femtosecond pulses from a conical axicon amplifier, Opt. Lett., 13: 984 (1988).ADSCrossRefGoogle Scholar
  9. 9.
    V.B. Gildenburg, A.V. Kim, and A.M. Sergeev, Possibility of sharp increase in the frequency of the radiation of ionizing laser pulse in gas, JETP Lett., 51:104 (1990).Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • A. M. Sergeev
    • 1
  • M. Lontano
    • 2
  • M. D. Chernobrovtseva
    • 1
  • A. V. Kim
    • 1
  1. 1.Institute of Applied Physics of the Russian Academy of SciencesNizhny NovgorodRussia
  2. 2.Istituto di Fisica del Plasma, Consiglio Nazionale delle RicercheEURATOM-ENEA-CNR AssociationMilanoItaly

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