Optical Dark and Kink Solitons in Multiple Core Couplers with Four Types of Nonlinearity

In recent years, solitons in nonlinear couplers have acquired attention of the researchers. The switching of solitons is possible using any optical logic gate. Optical switching is of particular interest due to the possibility of extremely fast switching time within the femtosecond range. In this study the dark and kink type solitons to two different types of optical multiple core couplers with four types of nonlinearities viz Kerr law nonlinearity, power law nonlinearity, parabolic law nonlinearity and dual power-law nonlinearity are extracted using the Kudryashov integration algorithm. Coupling with nearest neighbors is one example, whereas in the other case the coupling with all nearest neighbors is considered. The parametric constraint conditions, also called integrability criteria are emerging with these novel solutions and reported.