[3] [3] Bo-Hun Choi, Hyo-Hoon Park, Moojung Chu et al.. High-gain coefficient long-wave-band erbium-doped fiber amplifier using 1530-nm band. IEEE Photon. Technol. Lett., 2001, 13(2): 109～111

[4] [4] Aydin Yeniay, Renyuan Gao. Single stage high power L-band EDFA with multiple C-band seeds. OFC′2002, ThJ2, 2002. 457～458

[7] [7] Min Bumki, Yoon Hosung, Lee Won Jae et al.. Coupled structure for wide-band EDFA with gain and noise figure improvement from C to L-band ASE injection. IEEE Photon. Technol. Lett., 2000, 12(5): 480～482

[8] [8] Di Muro Rodolfo, Dan Lowe, Steve Wilson. Broad-band amplification using a novel amplifier topology. IEEE Photon. Technol. Lett., 2001, 13(10): 1073～1075

[9] [9] Flood F A. L-band erbium-doped fiber amplifiers. OFC′2000, WG1-2, 2000

[10] [10] Giles C R, Desurvire E. Modeling erbium-doped fiber amplifers. J. Lightwave Technol., 1991, 9(2): 271～283