[1] [1] Lu X X,Zhong L Y,She C L,et al. Acta Photonica Sinica,2002,31(4):463～466

[2] [2] Hu M L,Xu Z Y,Chen X Y,et al. Acta Photonica Sinica,2001,30(12):1516～1519

[3] [3] Xu S Y,Liu H F,Li W N,et al. Laser Journal,1999,20(3):27～29

[4] [4] Guo H M,Liu S,Zhang X S. Laser Journal,2000,21(2):49～50

[5] [5] Mu G G. Development on Modern Optics and Photonics.Tianjin: Tianjin Science and Technology Press,2003,2:119～132

[6] [6] Wang D,Zeng Y. Laser Journal,2004,25(3):48～51

[7] [7] Wang D,Li J S. Laser Journal,2003,24(1):45～47