k. Abass, A., Mohammed J. Abdul-Razak, Haneen H. Mohammed, Suad M. Kadhim and Mohammed A. Salih 2019. Optical Fiber Amplifiers: Optimization and Performance Evaluation. Diyala Journal of Engineering Sciences . 12, 1 (Mar. 2019), 66–72. DOI:https://doi.org/10.24237/djes.2019.12108.