[1] Mori A, Kobayashi K, Yamada M,et al. Low noise broadband tellurite-based Er3+-doped fiber amplifiers.Electronics Letters, 1998, 34(9):887～888

[2] Ohishi Y, Mori A, Yamada M,et al. Gain characteristics of tellurite-based erbium-doped fiber amplifiers for 1.5 μm broadband amplification.Optics Letters, 1998,23(4):274～276

[4] Lopez′-Barbero A P, Arellano-Espinoza W A, Fregnito H L,et al. Tellurite-based optical fiber amplifier analysis using the finite-element method. Microwave and Optical Technology Letters, 2000, 25(2):103～107

[6] Giles C R, Desurvire E. Modeling erbium-doped fiber amplifiers.IEEE J Lightwave technology, 1991,9(2):271～274

[7] Desurvire E, Simpson T R. Amplification of spontaneous emission in erbium-dpped single-mode fibers.IEEE J Lightwave technology, 1989,7(5):835～838

[8] Mears R J,Baker S R. Erbium fiber amplification and lasers.Optical Quantum Electronics, 1992,24:517～538

[9] Pasquale F D, Zoboli M, Federighi M, et al. Finite-element modeling of silica waveguide amplifiers with high erbium concentration.J Quantum Electron, 1994,30:1277～1282