[1] S. Kawanishi, H. Takara, K. Uchiyama, I. Shake, and K. Mori, in Proceedings of OFC'99 PD1-1 (1999).
[2] F. Futami and K. Kikuchi, IEICE Trans. Commun. E82-B, 1265 (1999).
[3] H. Takara, T. Ohara, K. Mori, K. Sato, E. Yamada, Y. Inoue, T. Shibata, M. Abe, T. Morioka, and K. I. Sato, IEEE Electron. Lett. 36, 2089 (2000).
[4] K. Mori, K. Sato, H. Takara, and T. Ohara, IEEE Electron. Lett. 38, 544 (2003).
[5] G. P. Agrawal, Nonlinear Fiber Optics & Application of Nonlinear Fiber Optics (in Chinese) D. F. Jia, Z. H. Yu, B. Tan, Z. Y. Hu, and S. C. Li (translated) (Publishing House of Electronics Industry, Beijing, 2002).
[6] K. Mori, H. Takara, and S. Kawanishi, J. Opt. Soc. Am. B 18, 1780 (2001).
[7] L. Xu, M. Y. Yao, Y. H. Li, J. Wu, M. H. Chen, J. F. Zhang, C. Y. Lou, and Y. Z. Gao, in Proceedings of CLEO'99, P1.50, 419 (1999).
[8] N. Nishizawa and T. Goto, IEEE J. Sel. Top. Quantum Electron. 7, 518 (2001).
