[1] [1] T. Y. Chang, C. Lin. Effects of buffer gases on an optically pumped CH3F FIR laser[J]. J. Opt. Soc. Am., 1976, 66(4)：362~369

[2] [2] R. Behn, I. Kjelberg,!P. D. Morgan et al.. A high power D2O laser optimized for microsecond pulse duration[J]. J. Appl. Phys., 1983, 54(6):2995～3002

[3] [3] Luo Xizhang, Qiu Ruman. Optimized operation of optically pumped NH3 laser emission at 12.08 μm and 12.81 μm[J]. Int. J. IR-MMW, 1997, 18(3):641～652

[4] [4] Luo Xizhang, Li Hongjian. The optimum operation of an unified mini-optically pumped NH3 submillimeter wave laser[J]. Int. J. IR-MMW, 1999, 20(2):203～212

[5] [5] Li Hongjian, Luo Xizhang, Huang Xiao et al.. Effects of buffer gas on the output of optically pumped NH3 far-infrared cavity laser[J]. Int. J. IR-MMW, 2000, 21(5):771～780

[7] [7] R. N. Schwartz, Z. I. Slawsky, K. F. Herzfeld. Calculation of vibrational relaxation time in gases[J]. J. Chem. Phys., 1952, 20(10):1591～1599