[1] W. A. Clarkson, Proc. SPIE 3682, 2 (1998).

[2] G. Zhang and S. Guo, Graphic Analysis and Design Method of Optical Resonator (in Chinese) (National Defence Industry Press, Beijing, 2003) p.4, 99.

[3] B. Lu, Laser Optics (in Chinese) (2nd edn.) (Sichuan University Press, Chengdu, 1992).

[4] W. A. Clarkson and D. C. Hanna, Opt. Lett. 21, 375 (1996).