[1] JIANG Ch,HU W Sh,ZENG Q J.Numerical analysis of concentration quenching model of Er3+-doped phosphate fiber amplifier[J].IEEE J Q E,2003,39(10):1266～1271.
[2] CHEN D N,DEURVIRE E.Noise performance evaluation of distributed erbium-doped fiber amplifers with bidirectional pumping at 1.48μm[J].IEEE Photonics Technology Letters,1992,4(1):52～55.
[3] MACK W D,VALLEY G C,HOLCOMB D P et al.Measurement and modeling of emission spectra of Er-Yb co-doped fibers[J].Lasers and Electro-Optics Society,2001,2(12～13):895～896.
[4] NUSINSKY I.Analysis of the effect of upconversion on signal amplification in erbium-doped fiber amplifiers(EDFAs)[J].IEEE J Q E,2003,39(4):548～554.
[5] BLIXT P,NILSSON J,CARLNAS T et al.Concentration-dependentupconversion in Er3+-doped fiber amplifiers:experiments and modeling[J].IEEE Transactions on Photonics Technology Letters,1991,3(11):996～998.
[6] NILSSON J,SCHEER P,JASKORZYNSKA B.Modeling and optimization of short Yb3+sensitized Er3+-doped fiber amplifiers[J].IEEE Photonics Technology Letters,1994,6(3):383～385.
[7] PASCHOTTA R,NILSSON J,TROPPER A C et al.Ytterbium-doped fiber amplifiers[J].IEEE J Q E,1997,33(7):1049～1056.
[8] HWANG B Ch,JIANG Sh B,LUO T et al.Performance of high-concentration Er3+-doped phosphate fiber amplifiers[J].IEEE Photonics Technology Letters,2001,13(3):657～659.
[9] ZHUANG M L,ZHAO Sh H,DONG Sh F et al.Numerical analysis of the population distribution characteristics in Er3+/Yb3+co-doped double-clad fiber amplifiers[J].Laser Technology,2004,28(4):379～382(in Chinese).
[10] KARASEK M.Optimum design of Er3+-Yb3+codoped fibers forlarge-signal high-pump-power applications[J].IEEE J Q E,1997,33(10):1699～1705.
[11] WANG Y,PO H.Dynamic characteristics of double-clad fiber amplifiers for high-power pulse amplification[J].IEEE Journal of Lightwave Technology,2003,21(10):2262～2270.
[12] MYERS M J.High gain short length phosphate glass erbium-doped fiber amplifier material[J].Optical Fiber Communication Conference and Exhibit,2001,3:1～3.
[13] ALEGRIA C,JEONG Y,CODEMARD C et al.83W single-frequency narrow-linewidth MOPA using large-core erbium-ytterbium co-doped fiber[J].IEEE Photonics Technology Letters,2004,16(8):1825～1827.
[14] XIA G J,DUAN J H,ZHAO Sh H et al.Performance study on double cladding Er-Yb co-doped fiber amplifiers with a reflector[J].Laser Technology,2004,28(1):12～19(in Chinese).