Optimizing of Raman gain and bandwidth for dual pump fiber optical parametric amplifiers based on four-wave mixing

Abstract This article has been retracted by IOP Publishing Limited as it contains substantial overlap with the following article published in Journal of Telecommunications System & Management: El-khashab et al 2018 J. Telecommun. Syst. Manage. 7 1. As a member of the Committee for Publication Ethics (COPE), IOP Publishing Limited has investigated this in accordance with COPE guidelines and it was agreed the article should be retracted. IOP Publishing Limited have been unable to contact the authors regarding this retraction, despite numerous attempts. The authors are encouraged to contact IOP Publishing Limited if they wish to contest this retraction.