en عمومى General پژوهشي Research In this paper, a brief summary of different methods of fabrication of optical preform and fiber is reviewed. Several methods of incorporation of erbium ions into optical preforms are studied. Characterization of the fabricated erbium doped fibers including measurements of refractive index profile, absorption, fluorescence and gain spectra and metastable lifetime are described. It is also expressed that many of these fabrication and characterization methods are feasible to be carried out in Iran. Erbium doped fiber amplifier, MCVD technique, VAD technique, Solution Doping, Flash condensation, EDF fabrication, EDF characterization, Fiber drawing, Aerosol Technique. 45 62 http://ijop.ir/browse.php?a_code=A-10-56-1&slc_lang=en&sid=1 N. Granpayeh granpayeh@eetd.kntu.ac.ir 10031947532846001166 10031947532846001166 Yes Faculty of Electrical and Computer Engineering, K.N. Toosi University of Technology P.L. Chu 10031947532846001167 10031947532846001167 No School of Electrical Engineering, University of N.S.W., Sydney, Australia I. Skinner 10031947532846001168 10031947532846001168 No School of Electrical Engineering, University of N.S.W., Sydney, Australia