[1] [1] Kan Ruifeng, Liu Wenqing, Zhang Yujun, et al.. Tunable diode laser absorption spectrometer monitors the ambient methane with high sensitivity[J]. Chinese J Lasers, 2006, 32(9): 1217-1220.

[2] [2] D D Nelson, J H Shorter, J B McManus, et al.. Sub-part-per-billion detection of nitric oxide in air using a thermoelectrically cooled mid-infrared quantum cascade laser spectrometer[J]. Appl Phys B, 2002, 75(3): 343-350.

[3] [3] Kang Ruifeng, Liu Wenqing, Zhang Yujun, et al.. Absorption measurements of ambient methane with tunable diode laser[J]. Acta Physica Sinica, 2005, 54(4): 1927-1930.

[4] [4] P Werle, R Mücke, F D Amato, et al.. Near-infrared trace-gas sensors based on room-temperature diode lasers[J]. Appl Phys B, 1998, 67(3): 307-315.

[5] [5] Rieker G B, Li H, Liu X, et al.. Adiode laser sensor for rapid, sensitive measurements of gas temperature and water vapour concentration at high temperatures and pressures[J]. Measurement Science and Technology, 2007,18(5): 1195-1204.

[6] [6] Philippe L C, Hanson R K. Laser diode wavelength-modulation spectroscopy for simultaneous measurement of temperature, pressure, and velocity in shock-heated oxygen flows[J]. Appl Opt, 1993, 32(30): 6090-6103.

[7] [7] Gao Xiaoming, Huang Wei, Li Ziyao, et al.. Sensitivity detection of CO2 molecule using near infrared diode laser absorption spectroscopy[J]. Acta Optica Sinica, 2003, 23(5): 609-611.

[8] [8] Yang Bin, He Guoqiang, Liu Peijin, et al.. TDLAS-based measurements of parameters for incoming flow hot-firing test of air-breathing rocket engine[J]. Chinese J Lasers, 2011, 38(5): 0508006.

[9] [9] Riris H, Carlisle C B, McMillen D F, et al.. Explosives detection with a frequency modulation spectrometer[J]. Appl Opt, 1996, 35(24): 4694-4704.

[10] [10] Li Han, Liu Jianguo, Kan Ruifeng, et al.. Simulation and analysis of second-harmonic signal based on tunable diode laser absorption[J]. Spectroscopy and Spectral Analysis, 2013, 33(4): 881-885.

[11] [11] Hu Yajun, Zhao Xuehong, Zhang Rui, et al.. Research on the effect of light intensity modulation on the line shape of the second harmonic in the wavelength modulation technology[J]. Acta Optica Sinica, 2013, 33(11): 1130002.

[12] [12] Kluzynski P, Axner O. Theoretical description based on Fourier analysis of wavelength-modulation spectrometry in terms of analytical and background signals[J]. Appl Opt, 1999, 38(27): 5803-5815.

[13] [13] S schilt, L Thevenaz, P Robet. Wavelength modulation spectroscopy: combined frequency and intensity laser modulation[J]. Appl Opt, 2003, 42(33): 6728-6738.

[14] [14] Whiting E E. An empirical approximation to Voigt profiles[J]. Journal of Quantitative Spectroscopy & Radiative Transfer, 1968, 8(6): 1379-1384.

[15] [15] R Arndt. Analytical line shapes for Lorentzian signals broadened by modulation[J]. Appl Phys, 1965, 36(5): 2522-2524.

[16] [16] J Reid, D Labrie. Second harmonic detection with tunable diode lasers-comparison of experiment and theory[J]. Appl Phys B, 1981, 26(4): 203-210.