Cubic-quartic optical solitons and other solutions for twin-core couplers with polynomial law of nonlinearity using the extended F-expansion method

Abstract

In this article, the extended F-expansion method is applied to secure cubic–quartic optical solitons for twin-core couplers with polynomial law of nonlinearity. Bright, singular, and bright–singular combo cubic–quartic solitons are derived. Also, periodic solutions, combo periodic solutions, exponential solutions and rational solutions are obtained. Moreover, for the physical illustration, some of the obtained solutions are represented graphically.