This paper studies the dynamics of optical solitons with an improved nonlinear Schrödinger’s equation that models the propagation of solitons through nano optical fibers. The traveling wave hypothesis as well as the ansatz method will be applied to extract bright and dark soliton solutions of this model. There are five types of nonlinearities that will be studied. They are Kerr law, power law, parabolic law, dual-power law and log law nonlinearity.