Effects of orbital angular momentum on few-cycle pulse shape: Coupling between the temporal and angular momentum degrees of freedom

Abstract

We describe the coupling between orbital angular momentum (OAM) and temporal degrees of freedom in pulsed Laguerre-Gauss beams. The effects of this coupling are to increase significantly the duration of few-cycle pulses when the OAM carried by the pulse is large, and to enhance spatiotemporal couplings. Contrary to other detrimental but retrievable effects such as spatial, group velocity and topological charge dispersions in these pulses, OAM-temporal coupling effects are unavoidable, and have therefore an impact in applications such as OAM-based optical communications, or in the generation of vortex-carrying attosecond pulses.

arXiv comment5 pages, 2 figures, bibliography error corrected

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Cited by in corpus (7)

• Couplings between the temporal and orbital angular momentum degrees of freedom in ultrafast vortices with propagation-invariant temporal shape
• Attosecond helical pulses
• Spatio-temporal Evolution Dynamics of Ultrashort Laguerre-Gauss Vortices in a Dispersive and Nonlinear Medium
• General laws of the propagation of ultrafast vortices in free space
• Directly determining orbital angular momentum of ultrashort Laguerre-Gauss pulses via autocorrelation measurement
• Broadband X-waves with orbital angular momentum
• Space-time non-separable dynamics of ultrashort vortex pulse with power exponential spectrum