Redshift of few-cycle infrared pulses in the filamentation regime

Details Redshift of few-cycle infrared pulses in the filamentation regime Redshift of few-cycle infrared pulses in the filamentation regime

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13i3005a&link_type=abstract

New Journal of Physics, Volume 13, Issue 9, pp. 093005 (2011).

Physics

Scientific paper

By focusing infrared (IR) pulses of low energy (~0.4 mJ) into an argon cell at a pressure of a few bars, a supercontinuum is generated with a long-wavelength tail that can exceed 1500 nm for initial pulse durations of ~5 fs in the single-filamentation regime. Numerical calculations simulating the propagation of single- or few-cycle IR pulses show that this red-shift is enhanced by a sharp leading edge appearing in the pulse temporal profile, as the pulse undergoes break-up due to the interplay between Kerr self-focusing, strong dispersion and plasma generation.

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