Abstract
We study Bessel-X pulses with dispersion in the cone angle that propagate without temporal spreading in a medium with group velocity dispersion (GVD). The general conditions for GVD-free propagation are given. Previously known results are encompassed as particular cases. We show that general GVD-free Bessel-X pulses, propagating at controlled phase and group velocities in the medium, can be generated in practice by means of an axicon and a circular diffraction grating.
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