  Technological advances in femtosecond laser sources call for the development
of increasingly refined characterization tools implying to enrich the existing
panel of operable nonlinear interactions. The present paper describes a novel
characterization method based on spectral-shearing interferometry which
exploits the non-standard rotational Doppler effect for producing the frequency
shear. This original approach, called DEER "Doppler Effect for Electric field
Reconstruction", provides a spectral-shearing in the absence of frequency
conversion and features multiple benefits as for instance the ability of
operation in the ultraviolet spectral range or the characterization of
ultra-broadband laser pulses.
