Theoretical analysis of supercontinuum and coloured conical emission produced during ultrashort laser pulse interaction with gases

V. V. Semak, M. N. Shneider

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We use a conceptually new approach to theoretical modelling of self-focusing in which we integrated diffractive and geometrical optics in order to explain and predict emission of white light and coloured rings observed in ultrashort laser pulse interaction. In our approach, laser beam propagation is described by blending the solution of the linear Maxwell's equation and a correction term that represents nonlinear field perturbation expressed in terms of paraxial ray-optics (eikonal) equation. No attempt is made to create an appearance of exhaustive treatment via use of complex mathematical models. Rather, emphasis is placed on elegance of the formulations leading to fundamental understanding of the underlying physics and, eventually, to an accurate practical numerical model capable of simulating white light generation and conical emission of coloured rings produced around the filament.

Original languageEnglish (US)
Article number045503
JournalJournal of Physics D: Applied Physics
Volume47
Issue number4
DOIs
StatePublished - Jan 29 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Keywords

  • conical emission
  • nonlinear optics
  • self-focusing
  • supercontinuum

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