[1] J. Gea-Banacloche, R. R. Schlicher, and M. S. Zubairy, Phys. Rev. A 38, 3514 (1988).

[2] V. Buzek and I. Jex, Mod. Opt. 38, 987 (1991).

[3] T. Nasreen and M. S. K. Razmi, J. Opt. Soc. Am. B 10, 1292 (1993).

[4] L. S. He and X. L. Feng, Phys. Rev. A 49, 4009 (1994).

[5] W. H. Tan and M. Gu, Phys. Rev. A 34, 4070 (1986).

[6] J. Feng, J. S. Wang, and Y. F. Gao, Acta Phys. Sin. (in Chinese) 50, 1279 (2001).

[7] Z. L. Cao and G. C. Guo, Acta Opt. Sin. (in Chinese) 18, 1045 (1998).

[8] X. Y. Zhang, Y. F. Li, and J. F. Sun, Acta Phys. Sin. (in Chinese) 51, 36 (2002).

[9] M. M. Asharf, Phys. Rev. A 50, 741 (1994).

[10] J. H. Eberly and K. W′edkiewicz, J. Opt. Soc. Am. 67, 1252 (1977).