Abstract
The general form of the cubic Boussinesq-type equation is considered. In special cases, this equation is reduced to the three different versions of the cubic Boussinesq equations and also the generalized modified cubic Boussinesq equation. Using both the slowly varying envelope approximation and the generalized perturbation reduction method, the cubic Boussinesq-type equation is transformed into the coupled nonlinear Schrödinger equations and the two-component nonlinear solitary wave solution is obtained. Explicit analytical expressions for the shape and parameters of the two-component nonlinear pulse oscillating with the sum and difference of the frequencies and wave numbers are presented. It can be seen that the obtained solution coincides with the vector 0π pulse of the self-induced transparency.
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