Rashed, A.N.Z. and Tabbour, M.S.F. and El-Meadawy, S. and Anwar, T. and Sarlan, A. and Yupapin, P. and Amiri, I.S.  (2019) The effect of using different materials on erbium-doped fiber amplifiers for indoor applications.  Results in Physics, 15.   ISSN 22113797