[1] R. Noe, D. Sandel, and V. Mirvoda, IEEE J. Sel. Top. Quantum Electron. 10, 341 (2004).

[2] L. Xi, X. Zhang, L. Yu, G. Zhou, H. Zhang, N. Zhang, J. Zhang, B. Wu, T. Yuan, M. Yao, and B. Yang, Chin. Opt. Lett. 2, 262 (2004).

[3] G. Ouyang, A. Eyal, and A. Yariv, J. Lightwave Technol. 22, 1844 (2004).

[4] H. Wang, J. Yu, J. Wang, and E. Yang, Acta Opt. Sin. (in Chinese) 24, 1533 (2004).

[5] L. Zhang, Q. Hu, Z. Lu, Y. Xu, and S. Zhao, Acta Opt. Sin. (in Chinese) 24, 767 (2004).

[6] H. Miao and C. Yang, IEEE Photon. Technol. Lett. 16, 2475 (2004).

[7] A. E. Willner, S. M. R. M. Nezam, L. S. Yan, Z. Q. Pan, and M. C. Hauer, J. Lightwave Technol. 22, 106 (2004).

[8] C. J. Xie, L. F. Mollenauer, and L. Moller, IEEE Photon. Technol. Lett. 15, 1073 (2003).