  Non-linear Compton scattering in ultra-short intense laser pulses is
discussed with the focus on angular distributions of the emitted photon energy.
This is an observable which is accessible easily experimentally. Asymmetries of
the azimuthal distributions are predicted for both linear and circular
polarization. We present a systematic survey of the influence of the laser
intensity, the carrier envelope phase and the laser polarization on the
emission spectra for single-cycle and few-cycle laser pulses. For linear
polarization, the dominant direction of the emission changes from a
perpendicular pattern with respect to the laser polarization at low-intensity
to a dominantly parallel emission for high-intensity laser pulses.
