Abstract
Based on the moments method, the analytical expressions for the beam propagation factor, the kurtosis parameter and the orbital angular momentum density distribution of a vortex cosh-Gaussian beam (vChGB) propagating in free space are derived. According to the obtained expressions, the beam propagation factor is determined by the decentered parameter b and the vortex charge m of the beam. The kurtosis parameter and the orbital angular momentum density are determined by the decentered parameter b, the vortex charge m and the propagation distance. Numerical examples are presented to illustrate and discuss the influences of the parameters b and m on the propagation characteristics of vChGB upon propagation in free space. This research could be beneficial to the applications involving vChGBs in optical communications, beam splitting, and micromanipulation of particles.
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