Propagation properties of chirped cosh-Gaussian beams in strongly nonlocal nonlinear media

Abstract

In this paper, we analytically investigated the evolution properties of chirped cosh-Gaussian beams in strongly nonlocal nonlinear media (SNNM). The expressions describing beam propagation, intensity distribution, and beam width are derived. The results show that in the absence of chirp, the evolution behavior of beam is similar to the solitons and breathers, which closely depends on the input power and initial parameter. In the presence of linear chirp, the optical beam periodically oscillates along a certain direction and exhibits the same structure as the unchirped beam. In the presence of quadratic chirp, the center symmetry of beam evolution is broken. Furthermore, we find that the evolution of beam width always changes periodically whatever the beam power is.