[1] [1] A. K. Garg and R. S. Kaler, Chin. Opt. Lett. 6, 807(2008).

[2] [2] K. Qiu and Y. Ling, Chin. Opt. Lett. 6, 96 (2008).

[3] [3] D. J. Blumenthal, B.-E. Olsson, G. Rossi, T. E. Dimmick, L. Rau, M. Ma sanovic, O. Lavrova, R. Doshi, O. Jerphagnon, J. E. Bowers, V. Kaman, L. A. Coldren, and J. Barton, J. Lightwave Technol. 18, 2058 (2000).

[4] [4] N. Chi, J. Zhang, P. V. Holm-Nielsen, L. Xu, I. T. Monroy, C. Peucheret, K. Yvind, L. J. Christiansen, and P. Jeppesen, Electron. Lett. 39, 676 (2003).

[5] [5] J. Zhang, N. Chi, P. Holm-Nielsen, C. Peucheret, and P. Jepperen, in Proceedings of OFC 2003 1, 279 (2003).

[6] [6] J. J. V. Olmos, I. T. Monroy, J. P. A. van Berkel, E. V. M. Verdurmen, J. G. L. Jennen, and A. M. J. Koonen, J. Lightwave Technol. 24, 3322 (2006).

[7] [7] X. Xin, P. S. Andre, A. L. J. Teixeira, C. Yu, A. Ferreira,T. Silveira, P. M. Monteiro, F. da Rocha, and J. L. Pinto, Chin. Phys. Lett. 22, 1948 (2005).

[8] [8] X. Xin, P. S. de Brito Andre, A. L. J. Teixeira, P. P. Monteiro, and J. R. F. da Rocha, ETRI Journal 27, 267(2005).

[9] [9] J. Zhang, N. Chi, P. V. Holm-Nielsen, C. Peucheret, and P. Jeppesen, IEEE Photon. Technol. Lett. 15, 1174(2003).

[10] [10] J. Zhang, N. Chi, P. V. Holm-Nielsen, C. Peucheret, and P. Jeppesen, Electron. Lett. 39, 1193 (2003).

[11] [11] J. Zhang, N. Chi, P. V. Holm-Nielsen, C. Peucheret, and P. Jeppesen, in Proceedings of OFC 2004 MF76 (2004).

[12] [12] T. van Muoi, IEEE Trans. Commun. COM-31, 608(1983).

[13] [13] M. C. Ho, C. L. Lu, R. T. Hofmeister, and L. G. Kazovsky, in Proceedings of CLEO'98 29 (1998).

[14] [14] D. Harres, in Proceedings of IEEE ICC 683 (1998).

[15] [15] Y. Yamada, Y. Shibata, T. Okugawa, and K. Habara, in Proceedings of ECOC 98 61 (1998).

[16] [16] N. Chi, L. Xu, J. Zhang, P. V. Holm-Nielsen, C. Peucheret, S. Yu, and P. Jeppesen, J. Lightwave Technol. 24, 1082 (2006).