[1] T. T. Victor, P. Tamar, L. May, and E. B. Joseph, Proc. SPIE 1954, 2 (1993).

[2] J. Peng and W. Zhou, Acta Electron. Sin. (in Chinese) 27, 47

[3] H. Leung and S. Haykin, Appl. Phys. Lett. 56, 593 (1990).

[4] N. He and S. Haykin, Electron. Lett. 28, 2076 (1992).

[5] H. Leung and T. Lo, IEEE J. Oceanic Eng. 18, 287 (1993).

[6] L. Yang, J. Yang, and K. Yang, Electron. Lett. 40, 1083 (2004).