[1] Flood F A. L-band erbium-doped fiber amplifiers [C]// OFC'2000, WG1-2, 2000

[2] Luo Jie,Ye Peida. Design consideration of erbium-doped fiber for efficient L-band EDFAs [J]. Acta Photonica Sinica (光子学报), 2000, 29(12): 1138-1140 (in Chinese)

[3] Tanaka S, Imai K, Yazaki T, et al. Ultral-wideband L-band EDFA using phosphorus co-doped silica-fiber [C]//OFC'2002, Th J3, 2002, 458-459

[4] Li Qian, Davide F, Benjamin S D, et al. Gain-flattened, extended L-band (1570～1620 nm) high power, low noise erbium-doped fiber amplifiers [C]// OFC'2002, Th J4, 2002, 459-461

[5] Flood, et al. Tech. Digest OAA '99 WD3-1 [C]//1999, 54-57

[6] Di Muro R. Dependce of L-band amplifier efficiency on pump wavelength and amplifier design [C]// OFC'2000,WG7-2, 2000

[7] . High-gain coefficient long-wave-band erbium-doped fiber amplifier using 1530 nm band[J]. IEEE Photonics Technology Letters, 2001, 13(2): 109-111.

[8] Yamashita T, Sawada H, Yoshida M, et al. High efficiency amplification of EDFA using a pump wavelength of the 1.53μm region [C]//ECOC'2000, 2000

[9] . Low noise operation of Er3+ doped silica fiber amplifier around 1.6 μm[J]. Electronics Letters, 1992, 28(20): 1924-1925.

[10] Yeniay A, Gao Renyuan. L-band EDFA gain and gain flatness enhancement via co-propagating C-band seed technique [C]// ECOC'2001-Amsterdam, Tu.L.3.1, 2001, 224-225

[11] Yeniay A, Gao Renyuan. Single stage high power L-band EDFA with multiple C-band seeds [C]//OFC'2002, ThJ2,2002, 457-458

[12] . L-band erbium-doped fiber amplifier incorporating an inline fiber grating laser[J]. IEEE Journal on Selected Topics in Quantum Electronics, 2001, 7(1): 44-48.

[13] . Coupled structure for wide-band EDFA with gain and noise figure improvement from C to L-band ASE injection[J]. IEEE Photonics Technology Letters, 2000, 12(5): 480-482.

[14] . Gain enhanced L-band Er3+-doped fiber amplifier utilizing unwanted backward ASE[J]. IEEE Photonics Technology Letters, 2001, 13(10): 1067-1069.

[15] . Broad-band amplification using a novel amplifier topology[J]. IEEE Photonics Technology Letters, 2001, 13(10): 1073-1075.

[16] . Broad-band erbium-doped fiber amplifier with double-pass configuration[J]. IEEE Photonics Technology Letters, 2001, 13(12): 1289-1291.

[17] . Comparative high power conversion efficiency of C- plus L-band EDFA[J]. Electronics Letters, 2001, 37(25): 1539-1541.

[18] Sugimoto R, Aizawa T, Sakai T, et al. High-power double-band EDFA with simple configuration [C]//ECOC'99,1999, 276-277

[19] Bolshtyansky M, DeMarco J, Wysocki P. Flat, adjustable hybrid optical amplifier for 1610～1640 nm band [C]//OFC'2002, Th J5, 2002, 461-463

[20] . Comparision of temperature dependence in C-band and L-band EDFAs[J]. Journal of Lightwave Technology, 2001, 19(4): 527-535.