TY - JOUR
T1 - Free-space nitrogen gas laser driven by a femtosecond filament
AU - Kartashov, Daniil
AU - Aliauskas, Skirmantas
AU - Andriukaitis, Giedrius
AU - Puglys, Audrius
AU - Shneider, Mikhail
AU - Zheltikov, Aleksei
AU - Chin, See Leang
AU - Baltuka, Andrius
PY - 2012/9/24
Y1 - 2012/9/24
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevA.86.033831
DO - 10.1103/PhysRevA.86.033831
M3 - Article
AN - SCOPUS:84866726312
SN - 1050-2947
VL - 86
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
M1 - 033831
ER -