Effect of light absorption on self-focusing of cosh-Gaussian laser beams in collisional plasma

In the present paper, the contribution of light absorption on self-focusing of cosh-Gaussian laser beams in collisional plasma is studied. The field distribution is expressed in terms of two transverse beam-width parameters, decentred parameters and linear absorption coefficient. Based on parabolic equation approach under Wentzel-Kramers-Brillouin (WKB) and the paraxial approximations, nonlinear differential equations governing the evolution of beam-width parameters are evaluated. The behavior of beam-width parameters with the normalized distance of propagation is studied for different values of decentred parameters and absorption coefficients in collisional plasma. The results are presented graphically and discussed.