Focused axisymmetric spatially chirped beams

A characterization of the focused space-time structures of radially chirped beams is provided, detailing different tunable properties such as: variable on-axis centroid velocity, symmetric pulse front tilt, transverse intensity modulations, and polarization states. While the practical generation of ideal radially chirped beams and polarizations can be problematic, it is shown that the primary characteristics of these beams can be mimicked with simple arrays of axisymmetric, 1D spatially chirped beams.