  We present a joint theory-experiment study on the transmission/absorption
saturation after ultrafast pulse excitation in graphene. We reveal an
unconventional double-bended saturation behavior: Both bendings separately
follow the standard saturation model exhibiting two saturation fluences,
however, the corresponding fluences differ by three orders of magnitude and
have different physical origin. Our results reveal that this new and unexpected
behavior can be ascribed to an interplay between fluence- and time-dependent
many-particle scattering processes and phase-space filling effects.
