Journal Pre-proofs Regular article Investigation on Factors Influencing Flatness of a Bidirectional SOA-based Multiwavelength Fiber Laser Abdul Hadi Sulaiman, Nelidya Md Yusoff, Muhammad Zamzuri Abdul Kadir, Fairuz Abdullah, Noran Azizan Cholan, Yasmin Mustapha Kamil, Mohd Adzir Mahdi PII: S1350-4495(20)30641-1 DOI: https://doi.org/10.1016/j.infrared.2020.103593 Reference: INFPHY 103593 To appear in: Infrared Physics & Technology Received Date: 27 August 2020 Accepted Date: 8 November 2020 Please cite this article as: A.H. Sulaiman, N.M. Yusoff, M.Z. Abdul Kadir, F. Abdullah, N.A. Cholan, Y.M. Kamil, M.A. Mahdi, Investigation on Factors Influencing Flatness of a Bidirectional SOA-based Multiwavelength Fiber Laser, Infrared Physics & Technology (2020), doi: https://doi.org/10.1016/j.infrared. 2020.103593 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier B.V.