[1] [1] Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Opt. Express 12, 6088 (2004).

[2] [2] A. Galvanauskas, Opt. Photon. News 15, (7) 42 (2004).

[3] [3] T. Y. Fan, IEEE J. Sel. Top. Quantum Electron. 11, 567 (2005).

[4] [4] J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammons, H. Komine, M. Weber, and M. Wickham, Proc. SPIE 6102, 61020U (2006).

[5] [5] B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, and Z. Wang, Acta Opt. Sin. (in Chinese) 26, 1279 (2006).

[6] [6] J. Hou, R. Xiao, Z. Jiang, B. Shu, J. Chen, and Z. Liu, High Power Laser and Particle Beams (in Chinese) 18, 1585 (2006).

[7] [7] B. He, Q. Lou, J. Zhou, D. Xue, J. Dong, Y. Wei, Y. Qi, and Z. Wang, Chinese J. Lasers (in Chinese) 33, 1153 (2006).

[8] [8] D. Sabourdy, A. Desfarges-Berthelemot, V. Kermène, and A. Barthélémy, Electron. Lett. 40, 1254 (2004).

[9] [9] L. Liu, Y. Zhou, F. Kong, and Y. C. Chen, in Proceeding of 2005 Quantum Electronics and Laser Science Conference 1289 (2005).

[10] [10] K. S. Thornburg, Jr., M. Moller, R. Roy, T. W. Carr, R.-D. Li, and T. Erneux, Phys. Rev. E 55, 3865 (1997).

[11] [11] J. R. Terry, K. S. Thornburg, Jr., D. J. DeShazer, G. D. VanWiggeren, S. Zhu, P. Ashwin, and R. Roy, Phys. Rev. E 59, 4036 (1999).

[12] [12] L. Luo, P. L. Chu, T. Whitbread, and R. F. Peng, Opt. Commun. 176, 213 (2000).

[13] [13] Y. Imai, H. Muraakwa, and T. Imoto, Opt. Commun. 217, 415 (2003).

[14] [14] M. Oka, H. Masuda, Y. Kaneda, and S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).

[15] [15] R. Roy and K. S. Thornburg, Jr., Phys. Rev. Lett. 72, 2009 (1994).

[16] [16] P. Zhou, J. Hou, Z. Chen, and Z. Liu, High Power Laser and Particle Beams (in Chinese) 19, 709 (2007).