[1] Zervas N,Laming R I,Payne D N.Trade-off between gain efficiency and noise figure in an optimized fiber amplifier.OFC′92 Technical Digest,San Jose,CA,1992,pp.148～149

[2] Laming R I,Payne D N.Noise characteristics of erbium-doped fiber amplifier pump at 980 nm.IEEE Photon Technol Lett,1990,2(6):418～421

[3] Polvsen J H,Bjarklev A,Lumholt O,et al.Optimizing gain and noise performance of EDFA′s with insertion of a filter or an isolator.Proc of SPIE,,1991,1581:107～113

[4] Laming R I,Zervas M N,Payne D N.Erbium-doped fiber amplifier with 54 dB gain and 3.1 dB noise figure.IEEE Photon Technol Lett,1992,4(12):1345～1347

[5] Lumholt O,Schusler K,Bjarklev A,et al.Optimum position of isolator within Erbium-doped fibers.IEEE Photon Technol Lett,1992,4(6):568～570

[6] Yamashita S,Okoshi T.Performance improvement and optimization of fiber amplifier with a mid-way isolator.IEEE Photon Technol Lett,1992,4(11):1276～1278

[7] Lumholt O,Polvsen J H,Schusler K,et al.Quantum limited noise figure operation of high gain Erbium doped fiber amplifiers.J Lightwave Technol,1993,11(8):1344～1352

[9] Giles C R,Desurvire E.Modeling Erbium-doped fiber amplifiers.J Lightwave Technol,1991,9(2):271～283