A.AL-Jumailly, T., and F. Y.AL-Abayagee. “Factors Affecting the Static Operation of Erbium Doped Fiber Amplifier(EDFA)”. Al-Rafidain Engineering Journal (AREJ), vol. 15, no. 2, June 2007, pp. 52-70, doi:10.33899/rengj.2007.44955.