Two-stage filamentation of 10 μm pulses as a broadband infrared backlighter in the atmosphere

Paris Panagiotopoulos, Miroslav Kolesik, Sergei Tochitsky, Stephan W Koch, Jerome V Moloney

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We identify a two-stage filamentation regime for high-power 10 μm multipicosecond pulses propagating in the atmosphere. The first low-intensity stage is mainly regularized by ionization through excitation induced dephasing, which can lead to strong pulse shortening downstream. This shortening in turn causes a significant reduction of the many-body induced plasma, which changes the dynamics drastically. As a result, a distinct second stage is predicted where peak intensities are clamped at 1 order of magnitude higher than in the first stage. The complex dynamics found in the second stage can result in the spatial and temporal breakup of the wavepacket, reduction of ionization losses, and extreme spectral broadening.

Original languageEnglish (US)
Pages (from-to)3122-3125
Number of pages4
JournalOptics letters
Volume44
Issue number12
DOIs
StatePublished - Jan 1 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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