High Power Laser Science and Engineering, Volume. , Issue , ()

Suppressing filamentation instability due to laser beam self-filtering [Early Posting]

Silin Dmitry, Khazanov Efim
Author Affiliations
  • FSBSI Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences
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    The development of small-scale self-focusing in a nonlinear Kerr medium after preliminary self-filtering of a laser beam propagating in free space is studied numerically. It is shown that, under definite conditions, due to self-filtering, filamentation instability (beam splitting into filaments) either occurs at significantly larger values of the B-integral, or does not occur at all. In the latter case, there develops a honeycomb instability revealed in this work. This instability is the formation of a random honeycomb structure in the beam cross section. It is shown that self-filtering can significantly increase the permissible values of the B-integral, at which the beam quality remains acceptable.

    Paper Information

    Manuscript Accepted: Feb. 6, 2024

    Posted: Feb. 18, 2024

    DOI: HPL-0202