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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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Self-focusing Distance of Very High Power Laser Pulses

Gadi Fibich, Shmuel Eisenmann, Boaz Ilan

    Optics Express
    |June 6, 2009
    PubMed

    Abstract:

    We show numerically for continuous-wave beams and experimentally for femtosecond pulses propagating in air, that the collapse distance of intense laser beams in a bulk Kerr medium scales as 1/P;1/2 for input powers P that are moderately above the critical power for self focusing, but that at higher powers the collapse distance scales as 1/P.

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