[1] C. Ye, M. Gong, P. Yan, Q. Liu, and G. Chen, Opt. Express 14, 7604 (2006).
[2] P. Dupriez, C. Finot, A. Malinowski, J. K. Sahu, J. Nilsson, D. J. Richardson, K. G. Wilcox, H. D. Foreman, and A. C. Tropper, Opt. Express 14, 9611 (2006).
[3] E. C. Honea, M. Savage-Leuchs, P. Jones, and C. Dilley, Proc. SPIE 6873, 68731W (2008).
[4] B. Peng, Q. Liu, M. Gong, and P. Yan, Chin. Opt. Lett. 5, 415 (2007).
[5] J. Zhou, P. Yan, C. Ye, H. Yu, and M. Gong, Chinese J. Lasers (in Chinese) 35, (S1) 143 (2008).
[6] G. P. Agrawal, Nonlinear Fiber Optics (3rd edn.) (Academic Press, New York, 2001).