True versus effective Kerr nonlinear response in optical filamentation

Research output: Contribution to journalArticle

Abstract

The optical Kerr effect, and the nonlinear polarization in general, represents an important light-matter interaction governing many regimes encountered in the nonlinear optics. We reason that in the context of optical filamentation one should distinguish the third-order Kerr effect occurring at relatively low light intensities from the effective Kerr nonlinearity relevant to higher intensity. While many properties of filaments can be captured well with a third-order nonlinear polarization model with a nonlinear index chosen somewhat higher than the true nonlinear index operative at low intensities, our comparative simulations indicate that some filamentation aspects carry significant signatures from the higher-order nonlinearity.

Original languageEnglish (US)
Pages (from-to)30172-30182
Number of pages11
JournalOptics Express
Volume26
Issue number23
DOIs
StatePublished - Nov 12 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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