Raman conversion in intense femtosecond Bessel beams in air

Maik A Scheller, Xi Chen, Gombojav O. Ariunbold, Norman Born, Jerome V Moloney, Miroslav Kolesik, Pavel G Polynkin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We demonstrate experimentally that bright and nearly collimated radiation can be efficiently generated in air pumped by an intense femtosecond Bessel beam. We show that this nonlinear conversion process is driven by the rotational Raman response of air molecules. Under optimum conditions, the conversion efficiency from the Bessel pump into the on-axis propagating beam exceeds 15% and is limited by the onset of intensity clamping and plasma refraction on the beam axis. Our experimental findings are in excellent agreement with numerical simulations based on the standard model for the ultrafast nonlinear response of air.

Original languageEnglish (US)
Article number053805
JournalPhysical Review A
Volume89
Issue number5
DOIs
StatePublished - May 5 2014

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air
refraction
pumps
radiation
molecules
simulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Raman conversion in intense femtosecond Bessel beams in air. / Scheller, Maik A; Chen, Xi; Ariunbold, Gombojav O.; Born, Norman; Moloney, Jerome V; Kolesik, Miroslav; Polynkin, Pavel G.

In: Physical Review A, Vol. 89, No. 5, 053805, 05.05.2014.

Research output: Contribution to journalArticle

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AU - Kolesik, Miroslav

AU - Polynkin, Pavel G

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AB - We demonstrate experimentally that bright and nearly collimated radiation can be efficiently generated in air pumped by an intense femtosecond Bessel beam. We show that this nonlinear conversion process is driven by the rotational Raman response of air molecules. Under optimum conditions, the conversion efficiency from the Bessel pump into the on-axis propagating beam exceeds 15% and is limited by the onset of intensity clamping and plasma refraction on the beam axis. Our experimental findings are in excellent agreement with numerical simulations based on the standard model for the ultrafast nonlinear response of air.

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