We report on the characterization of space–time couplings
in high-energy sub-2-cycle 770 nm laser pulses using a selfreferencing
single-frame method. Using spatially encoded
arrangement filter-based spectral phase interferometry for
direct electric field reconstruction, we characterize fewcycle
pulses with a wavefront rotation of 2.8 × 1011 rev∕s
(1.38 mrad per half-cycle) and pulses with pulse front
tilts ranging from −0.33 fs∕μm to −3.03 fs∕μm in the
focus.