Free-space nitrogen gas laser driven by a femtosecond filament

Daniil Kartashov, Skirmantas Aliauskas, Giedrius Andriukaitis, Audrius Puglys, Mikhail Shneider, Aleksei Zheltikov, See Leang Chin, Andrius Baltuka

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169 Scopus citations

Abstract

We report an experimental proof and full characterization of laser generation in molecular nitrogen in an argon-nitrogen gas mixture remotely excited at a distance above 2 m in a femtosecond laser filament. Filamentation experiments performed with near-infrared, 1-μm-wavelength and midinfrared, 4-μm-wavelength short-pulse laser sources show that mid-IR laser pulses enable radical enhancement of filamentation-assisted lasing by N 2 molecules. Energies as high as 3.5 μJ are achieved for the 337- and 357-nm laser pulses generated through the second-positive-band transitions of N 2, corresponding to a 0.5% total conversion efficiency from midinfrared laser energy to the energy of UV lasing.

Original languageEnglish (US)
Article number033831
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume86
Issue number3
DOIs
StatePublished - Sep 24 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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