Caustics and wavefront of Swallowtail-Gauss catastrophe beams
We analytically derive the propagating wavefront form of Swallowtail-Gauss beams (SGBs), Youth Barrel Saddles and we demonstrate the propagation characteristics of SGBs experimentally and numerically.During propagation, one type of SGBs gradually evolves into a deformed SGBs, which is very similar to a Pearcey-Gauss beam, and other types of SGBs ev