[1] [1] S. Furukawa, K. Tanaka, Y. Koyamada, and M. Sumida, IEEE Photon. Technol. Lett. 7, 540 (1995).

[2] [2] Z. Feng, S. Qiu, Y. Wei, L. Li, G. N. Liu, and Q. Xiong, in Proceedings of ACP2009 WL86 (2009).

[3] [3] J. P. King, D. F. Smith, K. Richards, P. Timson, R. E. Epworth, and S. Wright, J. Lightwave Technol. 5, 616 (1987).

[4] [4] M. Sumida, IEEE Photon. Technol. Lett. 7, 336 (1995).

[5] [5] M. Sumida, J. Lightwave Technol. 14, 2483 (1996).

[6] [6] F. W. Willems and J. S. Leong, IEEE Photon. Technol. Lett. 6, 1476 (1994).

[7] [7] S. Furukawa, K. Tanaka, and Y. Koyamada, in Proceedings of IMTC 94 TUPM5-2 (1994).

[8] [8] H. Izumita, Y. Koyamata, S. Furukawa, and I. Sankawa, J. Lightwave Technol. 12, 1230 (1994).

[9] [9] G. Agrawal, Nonlinear Fiber Optics (Academic Press, San Diego, 2001).

[10] [10] Z. Wang, Y. Fu, Y. Song, G. Dai, F. Wen, J. Zhao, and Y. Zhang, Chin. Opt. Lett. 9, 072701 (2011).

[11] [11] H. Izumita, Y. Koyamada, S. Furukawa, and I. Sankawa, J. Lightwave Technol. 15, 267 (1997).

[12] [12] K. Shimizu, T. Horiguchi, and Y. Koyamada, J. Lightwave Technol. 10, 982 (1992).

[13] [13] J. Yang, Z. Guo, and K. Zha, Chinese J. Lasers (in Chinese) 28, 439 (2001).

[14] [14] W. Chen and M. Zhou, Chinese J. Lasers (in Chinese) 38, 0305002 (2011).