TY - JOUR
T1 - Raman conversion in intense femtosecond Bessel beams in air
AU - Scheller, Maik
AU - Chen, Xi
AU - Ariunbold, Gombojav O.
AU - Born, Norman
AU - Moloney, Jerome
AU - Kolesik, Miroslav
AU - Polynkin, Pavel
PY - 2014/5/5
Y1 - 2014/5/5
N2 - 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.
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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U2 - 10.1103/PhysRevA.89.053805
DO - 10.1103/PhysRevA.89.053805
M3 - Article
AN - SCOPUS:84899877066
SN - 1050-2947
VL - 89
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 5
M1 - 053805
ER -