[2] [2] Siegman A E,Sziklas E A.Mode calculations in unstable resonator with flowing saturable gain.1:Hermite-Gaussianexpansion.Appl Opt,1974,13(12):2275～2792

[3] [3] Rensch D B.Three-dimensional unstable resonator calculations with laser medium.Appl Opt,1974,13(11):2546～2561

[4] [4] Chester A N.Three-dimensional diffraction calculations of laser resonator modes.Appl Opt,1973,12(10):2353～2366

[5] [5] Sziklas E A,Siegman A E.Mode calculations in unstable resonator with flowing saturable gain.2:Fast Fouriertransform method.Appl Opt,1975,14(8):1874～1889

[6] [6] Barmashenko B D,Elior A,Lebiush E,Rosenwaks S.Modeling of mixing in chemical oxygen-iodine lasers:Analyticand numerical solutions and comparison with experiments.J Appl Phys,1994,75(12):7653～7665