All optical logic switching devices via a combined Hirota and Lakshmanan–Porsezian–Daniel equation under the competing inhomogeneities in an optical fiber

We arrive at the soliton solutions by means of Darboux transformation for variable coefficient nonlinear Schrödinger equation with Hirota and LPD terms. For the first time, we control the soliton solutions through appropriately selecting the profiles of Hirota and LPD coefficients. Particularly, we attain the switching characteristics via inelastic collisions among multi-optical solitons in an inhomogeneous optical fiber system. These results provide some insights into the generalized variable coefficient NLS equation with Hirota and LPD for some real problems in the context of a fiber optic system. Results found through this paper have potential applications in the design of all-optical logic switching devices (AOLSD) for ultrafast switching.