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Opt Express. 2005 Jul 25;13(15):5897-903.

Self-focusing Distance of Very High Power Laser Pulses.

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.

PMID:
19498596
[PubMed]
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