Extended Data Fig. 5: Spectrally-resolved beam profiler images of the NOPA beam measured with TWINS.
From: Broadband control of topological–spectral correlations in space–time beams
a, RGB image of the NOPA beam at the output of the parametric amplifier. The spectrum measured on the left side of the beam has a weaker component in the green region as compared to the right side of the beam, corresponding to a small spatial chirp on the beam, in the sense that the spatial intensity profile has a slight frequency dependence. b–g, Spectral images of the beam for a selected set of wavelengths ranging from 710 nm to 523 nm obtained using the hyperspectral measurement technique. The size of all images is 11.2 mm × 7.0 mm.
