Multiple filamentation induced by input-beam ellipticity

Audrius Dubietis*, Gintaras Tamošauskas, Gadi Fibich, Boaz Ilan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

170 Scopus citations


We provide what is to our knowledge the first experimental evidence that multiple filamentation (MF) of ultrashort pulses can be induced by input beam ellipticity. Unlike noise-induced MF, which results in complete beam breakup, the MF pattern induced by small input beam ellipticity appears as a result of nucleation of annular rings surrounding the central filament. Moreover, our experiments show that input beam ellipticity can dominate the effect of noise (transverse modulational instability), giving rise to predictable and highly reproducible MF patterns. The results are explained with a theoretical model and simulations.

Original languageEnglish
Pages (from-to)1126-1128
Number of pages3
JournalOptics Letters
Issue number10
StatePublished - 15 May 2004


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