This research paper investigates the unprecedented optical closed form of solutions for the generalized higher-order nonlinear Schrödinger (NLS) equation, which is considered as a fundamental model in the optical fiber by the implementation of the modified Khater method. The suggested equation describes the promulgation of the light-wave in an optical fiber. Some novel solutions are obtained by using the suggested method, which is considered as one of the recent methods developed in the last decades. The performance of the used method shows the power and effective of the method and its ability for applying to many different forms of nonlinear evolution equations. The obtained solutions verified with Maple 16 & Mathematica 12 by placing them back into the original equations.