Exhibit of highly dispersive optical solitons in birefringent fibers with four forms of nonlinear refractive index by exp-function expansion

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This paper employs exp-function scheme to obtain highly dispersive optical solitons that appear, in birefringent fibers, with four forms of nonlinear media. These are Kerr law, quadratic-cubic law, polynomial law and non-local law. The existence criteria of the solitons are also presented.