[2] [2] LI Tian-chu. Lamb′s theory of traveling-wave Gaussian beams and output expressions of ring lasers considering the radial distribution ［J］. China Laser, 1982，10(7): 389-394.

[3] [3] COLLINS S A. Lens-system diffraction integral written in terms of matrix optics［J］. J Opt Soc Amer, 1970, 60(9): 1168-1177.

[5] [5] GAO Ai-hua, GU Qiao, LU Zhi-guo. The maladjustment of laser cavity and light beam quality ［J］. Acta Photonica Sinica, 1999，28(8): 763-766.

[6] [6] ZHANG Yan-shen. The laser gyro′s optical control-visiting Germany ［J］. Cruise Missile, 1996，(6)：53-58.

[7] [7] HONG Xi-chun, HUANG Wei-gang, WANG Shao-min. Diffraction integral formula for misaligned optical systems ［J］. Physics Letters, 1982，31(28)：1655-1663.

[8] [8] LIAO Fu-zhong. Langmuir flow effect in a ring cavity during the light deflection ［J］. Laser, 1979，6(12)：1-7.

[9] [9] GAO Bo-long, JIANG Ya-nan. Zero drift effects in the langmuir flow ［J］. Journal of Applied Sciences, 1980,(8):33-51.

[10] [10] GU Qiao. On optimum design of a flat-concave resonator［J］. Applied Laser, 1987, 7(1):36-37.