[1] Teng H, Yun C X, Zhu J F, Han H N, Zhong X, Zhang W, Hou X
and Wei Z Y 2009 Chin. Phys. Lett. 26 113201

[2] Dai Y T and Xu C 2009 Opt. Express 17 6584

[3] Li Y X, Ji Z G, Zeng Z N, Liu J S, Ge X C, Li R X and Xu Z
Z 2008 Chin. Phys. Lett. 25 3272

[4] Li Y X, Zeng Z N, Ge X C, Chen X W, Li R X and Xu Z Z 2008
Chin. Phys. Lett. 25 4296

[5] Xu S X, Gao Y X, Cai H and Li J Z 2009 Chin. Phys.
Lett. 26 114209

[6] Bartels A, Dekorsy T and Kurz H 1999 Opt. Lett.
24 996

[7] Jones D J, Diddams S A, Ranka J K, Stentz A J, Windeler R
S, Hall J L and Cundiff S T 2000 Science 288 635

[8] Chu S W, Liu T M, Sun C K, Lin C Y and Tsai H J 2003
Opt. Express 11 933

[9] Jeon M Y, Lee H K, Ahn J T, Kim K H, Lim D S and Lee E H
1998 Opt. Lett. 23 855

[10] Gupta K K, Onodera N, Abedin K S and Hyodo M 2002
IEEE Photo. Tech. Lett. 14 284

[11] Yang S Q, Zhao C L, Li Z H, Yuan S Z and Dong X Y 2002
Chin. Phys. Lett. 19 786

[12] Yandong G, Ping S and Dingyuan T 2002 Micro. Opt.
Technol. Lett. 32 320

[13] Gong Y D, Shum P, Tang D Y, Lu C, Qi Z W, Lai W J, Man W
S and Tam H Y 2003 Opt. Commun. 220 297

[14] Kennedy R E, Popov S V and Taylor J R 2006 Opt.
Lett. 31 167

[15] Gong Y D, Shum P, Tang D Y, Lu C and Guo X 2003 Opt.
Express 11 2480

[16] Honzatko P, Peterka P and Kanka J 2001 Opt. Lett.
26 810

[17] Yoshida E and Nakazawa M 1997 Opt. Lett. 22
1409

[18] Hong W P 2002 Opt. Commun. 213 173

[19] Agrawal G P 1992 IEEE Photo. Technol. Lett. 4
562

[20] Hasegawa A 1984 Opt. Lett. 9 288