Optical Solitons in Fiber Bragg Gratings with Dispersive Reflectivity Having Five Nonlinear Forms of Refractive Index

This paper implements the trial equation approach to retrieve cubic–quartic optical solitons in fiber Bragg gratings with aid of methodology. Five forms nonlinear refractive index structures are considered. They Kerr law, parabolic polynomial quadratic–cubic and nonlocal law. Dark singular soliton solutions recovered along Jacobi’s elliptic functions an appropriate modulus ellipticity.