Sharif University of TechnologyScientia Iranica1026-309827620201201Optical solitons in birefringent fibers with four-wave mixing by extended trial equation method303530522114410.24200/sci.2018.21144ENA.BiswasDepartment of Physics, Chemistry and Mathematics, Alabama A&M University, Normal, AL 35762-4900, USA.; Department of Mathematics and Statistics, Tshwane University of Technology, Pretoria-0008, South Africa.M.EkiciDepartment of Mathematics, Faculty of Science and Arts, Yozgat Bozok University, 66100 Yozgat, TurkeyA.SonmezogluDepartment of Mathematics, Faculty of Science and Arts, Yozgat Bozok University, 66100 Yozgat, TurkeyQ.ZhouSchool of Electronics and Information Engineering, Wuhan Donghu University, Wuhan-430212, People's Republic of ChinaS.P.MoshokoaDepartment of Mathematics and Statistics, Tshwane University of Technology, Pretoria-0008, South AfricaM.BelicScience Program, Texas A&M University at Qatar, P.O. Box 23874, Doha, QatarJournal Article20170609This paper obtains optical soliton solutions in birefringent bers that are studied in presence of four-wave mixing.The extended trial function scheme is the integration algorithm that is applied. Both Kerr law and parabolic laws are taken into account. The soliton solutions are presented with relevant integrability criteria.http://scientiairanica.sharif.edu/article_21144_542153ae703058005411ff8679bb7c9e.pdf