Extremely broadened high-order harmonics generated by the femtosecond pulses propagating through the filaments in air

Ganeev, R. A.; Kuroda, H.
November 2009
Applied Physics Letters;11/16/2009, Vol. 95 Issue 20, p201117
Academic Journal
We demonstrate a considerable broadening of the harmonics generating in laser plasma using the laser pulses propagating through the filaments in air. A fourfold increase of harmonic bandwidth was achieved in the case of phase-modulated laser pulses, alongside with an increase in harmonic conversion efficiency (from 5×10-6 to 1.2×10-5). We also present the studies of harmonic generation using phase-modulated pulses at different ranges of ellipticity of the polarization of laser beam.


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