Abstract
Self-action of a spatially annular femtosecond laser beam with spiral phase dislocation in a transparent dielectric with anomalous group velocity dispersion is studied. Based on numerical simulations the analysis of spatiotemporal evolution of intensity distribution in a pulsed optical vortex beam at the wavelength nm in fused silica is carried out. It is predicted the formation of annular light bullets with dynamical localization of intense laser field in thin rings with width of approximately , duration of optical oscillations and intensity higher than W cm−2.
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