  High dynamic range contrast measurement of laser pulses is typically obtained
by cross-correlating the laser pulse with a self-generated reference laser
pulse directly in the temporal domain. Alternatively, it is also possible to
measure the spectral interferogram of the laser pulse with the references pulse
in the spectral domain, from which the high dynamic range contrast measurement
can be extracted using inverse Fourier-transformation. Here, we demonstrate
single-shot 60 dB dynamic range laser contrast measurement by inverse
Fourier-transforming the measured spectral interferogram into temporal domain.
The result directly provides the cross-correlation of the laser pulse with the
reference pulse provided there is enough time-delay imposed between the laser
and reference pulses. Then method is cross-calibrated by measuring known
pre-pulses along with scanning third-order auto-correlator measurements.
