Complete spatial characterization of an optical wavefront using a variable-separation pinhole Pair

Here we demonstrate a new technique for completely characterizing the spatial properties of high harmonic generation (HHG), capable of recovering the frequency-resolved intensity and phase profiles, as well as the spatial coherence of the source. In keeping with the nomenclature established by previous work, we dub our technique SCIMITAR (Scanning Interference Measurement for Integrated Transverse Analysis of Radiation).