Abstract
In the present paper, we have investigated the self-focusing of zeroth-order Bessel-Gaussian beams in collisional plasma with density ripple. Based on Wentzel-Kramers-Brillouin and the paraxial ray approximations, the nonlinear differential equation governing the evolution of beam-width parameter is evaluated. The variation of beam-width parameter with propagation distance is examined for different values of ripple wave number and beam parameters. From our study, it is seen that stronger self-focusing is obtained when the density ripple is important. The results corresponding to Gaussian beams are deduced from this work as a particular case.