[1] [1] Zhou Bingkun et al.. Laser Principle [M]. Beijing: The Press of National Defense, 1983. 419～421 (in Chinese)

[2] [2] Sigrid Avrillier, Jacques Verdonck. Coupling losses in laser resonantors containing a hollow rectangular dielectric waveguide [J]. J. Appl. Phys., 1977, 48(12):4937～4941

[3] [3] Lan Xinju et al.. Laser Techniques. Hunan: The Press of Hunan Science and Technology, 1979. 196, 210 (in Chinese)

[4] [4] Paul E. Jackson, Denis R. Hall, Christopher A. Hill. Comparisons of wavegaide folding geometry's in a CO2 z-fold laser [J]. Apple. Opt. 1989, 28(5):935～941