[1] [1] S. I. Zavgorodneva, V. I. Kuprenyuk, V. E. Sherstobitov. Unstable resonator with field rotation［J］. Sov. J. Quantum Electron., 1977, 7(6): 787～788

[2] [2] Yu. A. Anan'ev，V. I. Ku Prenyuk, V. E. Sherstobitov. Properties of unstable resonator with field rotation I.Theoretical principles［J］. Sov. J. Quantum Electron., 1979, 9(9): 1105～1110

[3] [3] V. N. Kuprenyuk, V. E. Semenov, L. D. Smirnova et al.. Wave approximation calculation of an unstable resonator with field rotation［J］. Sov. J. Quantum Electron., 1983, 13(12): 1613～1617

[4] [4] Wei Zaifu, Wang Runwen, Wang Zhijiang. Geometric property analysis of unstable ring resonators with 90° beam rotation［J］. Acta Optica Sinica, 1995, 15(5): 513～519

[5] [5] Wei Zaifu, Wang Runwen, Wang Zhijiang. Numerical simulations of field distortion of unstable ring resonators with 90°beam rotation［J］. Chinese J. Lasers, 1995, A22(12): 882～890

[6] [6] Gao Huide, Dong Yunhua, Li Qi et al., Numerical analysis of output mode of UR90 unstable ring resonator［J］. Acta Optica Sinica, 1996, 16(12): 1705～1707

[7] [7] Wei Qing, Wei Zaifu, Wang Runwen. Mode calculation in annular output ring unstable resonators with 90°beam rotation［J］. Chinese J. Lasers, 1999, A26(9): 852～858

[8] [8] Wei Qing, Wu Tieqiang, Wei Zaifu et al.. Experimental research of UR90 resonator with combined coherent output［J］. Chinese J. Lasers, 2000, A27(7): 593～596

[9] [9] Alan H.Paxton, William P.Latham Jr.. Unstable resonators with 90°beam rotation［J］. Appl. Opt., 1986, 25(17): 2939～2946

[10] [10] Scott Holswade, Rafael Riviere, Carl A. Huguley. Experimental evaluation of an unstable ring resonator with 90° beam rotation: HiQ experimental results［J］. Appl. Opt., 1988, 27(21): 4396～4406

[11] [11] Zhou Dazheng, Jin Yuqi, Zhao Tong. Experimental investigation on a 2 kW COL UR90［J］. High Power Laser and Particle Beams, 1997, 9(2): 215～220

[12] [12] Jin Yuqi, Zhao Tong, Xu Wengang et al.. Investigation of UR90 with aperture output beam for a chemical oxygen iodine laser［J］. High Power Laser and Particle Beams, 1999, 11(5): 513～516

[13] [13] Yuqi Jin, Fengting Sang, Bailing Yang et al., Investigation of UR90 outputting annular beam for a chemical oxygen iodine laser［C］. SPIE, 2001, 4184:70～74

[14] [14] Li Junchang. Laser Diffraction and Thermal Acting Calculation［M］. Beijing: Science Press,2002. 98～117

[15] [15] J. T. Hunt, J. A. Glaze, W. W. Simmons. Light propagation through large laser systems ［J］. IEEE. J. Quantum Electron., 1981, QE-17: 1741～1743