This paper studies chirped optical solitons in nonlinear optical fibers. However, we obtain diverse soliton solutions and new chirped bright and dark solitons, trigonometric function solutions and rational solutions by adopting two formal integration methods. The obtained results take into account the different conditions set on the parameters of the nonlinear ordinary differential equation of the new extended direct algebraic equation method. These results are more general compared to Hadi et al (2018 Optik 172 545–53) and Yakada et al (2019 Optik 197 163108).

中文翻译：

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非线性光纤中的chi光学孤子和新的复杂行波

本文研究非线性光纤中的optical孤子。但是，通过采用两种形式的积分方法，我们获得了多种孤子解和新的bright明暗孤子，三角函数解和有理解。获得的结果考虑了新的扩展直接代数方程方法的非线性常微分方程的参数设置的不同条件。与Hadi等人（2018 Optik 172 545–53）和Yakada等人（2019 Optik 197 163108）相比，这些结果更为笼统。