Pure quartic three-dimensional spatiotemporal Kerr solitons in graded-index media

The authors study the formation of three-dimensional spatiotemporal solitons in waveguides with a parabolic refractive index profile and pure quartic chromatic dispersion using variational and numerical methods. They find that pure quartic spatiotemporal solitons remain stable within a significantly larger energy range with respect to their second-order dispersion counterparts.