Exact solutions of coupled kdv equation derived from the coupled NLS equation using multiple scales method

摘要

In this paper, we have considered a generalized coupled higher-order nonlinear Schr?dinger equations. We applied multiple scales method to coupled higher-order nonlinear Schr?dinger equations to derive the coupled KdV equation. Then, the extended tanh method is applied to derived coupled KdV equation for exact solutions. The obtained results include solitary wave solutions.