[1] [1] F. A. Flood. L-band erbium-doped fiber amplifiers [C]. OFC'2000, paper WG-1

[2] [2] J. F. Massicott, J. R. Armitage, R. Wyatt et al.. High gain, broadband, 1.6 μm Er3+ doped silica fibre amplifier [J]. Electron. Lett., 1990, 26(20):1645～1646

[3] [3] J. M. Oh, H. B. Choi, D. Lee et al.. Efficient tunable fiber ring laser for 1580 nm band with a fiber Bragg grating [C]. OFC'2001, paper WA-6

[4] [4] S. K. Kim, M. J. Chu, J. H. Lee. L-band multi-wavelength erbium-doped fiber laser [C]. OFC'2001, paper WDD-19

[5] [5] J. Lee, Uh-Chan Ryu, S. J. Ahn et al.. Enhancement of power conversion efficiency for an L-band EDFA with secondary pumping effect in the unpumped EDF section [J]. IEEE Photon. Technol. Lett., 1999, 11(1):42～45

[6] [6] Hirotaka Ono, Makoto Yamada, Terutoshi Kanamori et al.. 1.58-μm band gan-flattened erbium-doped fiber amplifiers for WDM transmission systems [J]. J. Lightwave Technol., 1999, 17(3):490～496

[7] [7] A. Buxens, H. N. Poulsen, A. T. Clausen et al.. Gain flattened L-band EDFA based on upgraded C-band EDFA using forward ASE pumping in an EDF section [J]. Electron. Lett., 2000, 36(9):821～823

[8] [8] U. Ghera, N. Konforti, M. Tur. Wavelength tunability in a Nd-doped fiber laser with an intracavity polarizer [J]. IEEE Photon. Technol. Lett., 1992, 4(1):4～6

[9] [9] T. Pfeiffer, H. Schmuck, H. Bülow. Output power characteristics of erbium-doped fiber ring lasers [J]. IEEE Photon. Technol. Lett., 1992, 4(8):847～849