[1] E. J. Post, Re. Mod. Phy. 39, 475 (1967).

[2] J. R. Wilkinson, Prog. Quantum Electron. 11, 1 (1987).

[3] G. Z. Xiao, X. W. Long, B. Zhang, and G. Li, Chin. Opt. Lett. 9, 101201 (2011).

[4] J. D. Cresser, W. H. Louisell, P. Meystre, W. Schleich, and M. O. Scully, Phys. Rev. A 25, 2214 (1982).

[5] B. L. Gao, Journal of NUDT (in Chinese) 1-36 (1979).

[6] F. Aronowitz, "Theory and operation of a traveling-wave laser" PhD. Thesis (New York University, 1969).

[7] F. Aronowitz, J. Appl. Phys. 41, 130 (1970).

[8] H. A. Haus, J. Quantum Electron. 21, 78 (1985).

[9] L. N. Mengozzi and W. E. Lamb, Phys. Rev. A 8, 2103 (1973).

[10] R. J. C. Spreeuw, R. Centeno, and N. J. van Druten, Phys. Rev. A 42, 4315 (1990).

[11] R. Rodloff, IEEE J. Quantum Electron. 23, 438 (1987).

[12] J. E. Killpatrick, "Laser angular rate sensor," U.S. patent 3, 373, 650 (April 2, 1965).

[13] J. X. Tang, "Research and Design for Dither Bias System of Mechanically Dithered Ring Laser Gyroscopes" (in Chinese) PhD. Thesis (National University of Defense Technology, 2000).

[14] W. W. Chow, Rev. Mod. Phys. 57, 61 (1985).

[15] D. Loukianov, Optical Gyros and their Application (DTIC Document, 1999).

[16] A. A. Morgan and G. R. Quasius, "Ring laser gyro system," U.S. patent 4,529,311 (Jul. 16, 1985).

[17] H. A. Gustafson, W. L. Lim, and F. H. Zeman, "Ring Laser Lock-in Correction Apparatus," U.S. patent 4,641,970 (Feb. 10, 1987).

[18] Z. Fan, H. Luo, S. Hu, and G. Xiao, Opt. Eng. 50, 034403 (2011).