[1] Paul E, Green Jr., Frank J. et al.. WDM protocol-transparent distance extension using R2 remodulation[J]. IEEE J. Areas Commun., 1996, 14(5): 962～967

[2] J. Nakagawa, M. E. Marhic, L. G. Kazovsky. All-optical 3R regeneration technique using injection-locking in gain-switched DFB-LD[J]. Electron. Lett., 2001, 37(4): 231～232

[3] H. J. Thiele, A. D. Ellis, I. D. Phillips. Recirculating loop demonstration of 40 Gbit/s all-optical 3R data regeneration using a semiconductor nonlinear interferometer[J]. Electron. Lett., 1999, 35(3): 230～231

[4] G. Raybon, Y. Su, J. Leuthold et al.. 40 Gbit/s Pseudo-linear transmission over one million kilometers[C]. OFC/IOOC ′02. Technical Digest, 2002 , Page(s): FD10/1～FD10/3 Anahelm, Califomla

[5] Tomohiro Otani, Tetsuya Miyazaki, Shu Yamamoto et al.. 40-Gb/s optical 3R regenerator using electroabsorption modulators for optical networks[J]. IEEE J. Lightwave Technol., 2002, 20(2): 195～200

[8] D. J. Kuizenga, A. E. Siegman. FM and AM mode locking of the homogeneous laser-part I: Theory[J]. IEEE J. Quant. Electron., 1970, 16(11): 694～708

[9] Zhihong Li, Caiyun Lou, Yuhua Li et al.. Effect of tunable filter characteristics on the pulse performance of actively mode locked fiber lasers[J]. IEEE Photon. Technol. Lett., 2000, 12(11): 1462～1464