[1] A. Evans, in Proceedings of OFC'2001 TuF4 (2001).
[2] X. Zhou, H. H. M. Shalaby, C. Lu, P. Shum, and T. Cheng, in Proceedings of OFC'2001 WDD17-1 (2001).
[3] M. Sobe and Y. Yano, in Proceedings of OFC'2002 TuJ5 (2002).
[4] W. Zhang, X. Feng, J. D. Peng, and X. M. Liu, IEEE Photon. Technol. Lett. 16, 69 (2004).
[5] S. Bigo, A. Bertaina, and J.-P. Hamaide, IEEE Photon. Technol. Lett. 11, 671 (1999).
[6] V. E. Perlin and H. G. Winful, J. Lightwave Technol. 20, 409 (2002).
[7] M. Zirgibl, Electron. Lett. 34, 789 (1998).