Fig. 4: Spatio-temporal intensity profile of the amplified HHG pulse and comparison with experiment.
From: Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier
a The beam shows a rich structure with temporal (Rabi) oscillations. The curved iso-intensity contours reveal two intensity maxima that are not located at the central part of the amplifier. All these structures are induced by the plasma waveguide inhomogeneous profile and the lasing ion abundance through its radial profile and the depletion of lasing ions in the central part of the amplifier. b The numerically accumulated intensity and phase show excellent agreement with the experimental results. Errors of experimental data are shown in pale colours, and the black bars indicate the diameter
