[1] Sun K, Chao X, Sur R et al. Wavelength modulation diode laser absorption spectroscopy for high-pressure gas sensing[J]. Applied Physics B, 110, 497-508(2013).

[2] Zhang Z R, Pang T, Sun P S et al. Measurement of carbon isotope of methane and analysis of its genesis type using laser absorption spectroscopy[J]. Chinese Journal of Lasers, 46, 1211001(2019).

[3] Bolshov M A, Kuritsyn Y A, Romanovskii Y V. Tunable diode laser spectroscopy as a technique for combustion diagnostics[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 106, 45-66(2015).

[4] Jiang J, Ma G M, Song H T et al. Highly sensitive detection of methane based on tunable diode laser absorption spectrum[C]//2016 IEEE International Instrumentation and Measurement Technology Conference Proceedings, May 23-26, 2016, Taipei, Taiwan, China., 1-5(2016).

[5] Qu D S, Hong Y J, Wang G Y et al. Study on mass flux measurement methods of gas based on scanning wavelength modulation spectroscopy[J]. Chinese Journal of Lasers, 43, 0904006(2016).

[6] Stewart G, Johnstone W. Bain J R P, et al. Recovery of absolute gas absorption line shapes using tunable diode laser spectroscopy with wavelength modulation: part I: theoretical analysis[J]. Journal of Lightwave Technology, 29, 811-821(2011).

[7] Zeng X B, Wang H X, Wang Z M et al. Methane detection system performance improvement based on sawtooth modulation half-wave scanning technology[J]. Infrared and Laser Engineering, 46, 0817003(2017).

[8] Zhang Y Q, Wang F, Cui H B. Temperature measurement of carbon dioxide using fixed-wavelength absorption spectroscopy technique[J]. Laser & Optoelectronics Progress, 56, 193001(2019).

[9] Baer D S, Nagali V, Furlong E R et al. Scanned- and fixed-wavelength absorption diagnostics for combustion measurements using multiplexed diode lasers[J]. AIAA Journal, 34, 489-493(1996).

[10] Pokrowsky P, Whittaker E A, Bjorklund G C. Determination of offset between a fixed wavelength laser and an absorption line using frequency modulation spectroscopy[J]. Optics Communications, 45, 196-200(1983).

[11] Liu H F, Li B, He Q X et al. Development of a digital orthogonal lock-in amplifier and its application in methane detection[J]. Acta Photonica Sinica, 45, 0423004(2016).

[12] Tang Q X, Zhang Y J, Chen D et al. Research on wavelength shift correction algorithm for tunable laser absorption spectrum[J]. Spectroscopy and Spectral Analysis, 38, 3328-3333(2018).

[13] Zhu Y K, Zhou B, Wang Y H et al. Research on calibration-free fixed-point wavelength modulation spectroscopy based on wavenumber drift-correction algorithm[J]. Acta Optica Sinica, 39, 0830001(2019).

[14] Wei Y B. Research on key technologies of optical fiber gas sensor and its application in safety engineering[D]. Jinan: Shandong University(2016).

[15] Gao G Z, Chen B X, Hu B et al. Sensitive detection of CO based on tunable multi-mode diode laser absorption spectroscopy[J]. Journal of Optoelectronics·Laser, 25, 718-723(2014).

[16] Zhao Y J, Wang C, Liu T Y et al. Application in methane extraction of fiber methane monitoring system based on spectral absorption[J]. Spectroscopy and Spectral Analysis, 30, 2857-2860(2010).

[17] Lin J L. Research on spectral line profile and line width of high-resolution (saturation) molecular spectra and its application Wuhan: Wuhan Institute of Physics and Mathematics,[D]. Chinese Academy of Sciences(2001).

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

[19] Xu Z Y. Research on temperature measurement and 2D distribution for tansient combustion process by infrared absorption spectroscopy Hefei: Hefei Institutes of Physical Science,[D]. Chinese Academy of Sciences(2012).

[20] Cong M L, Sun D D, Wang Y D. Application of logarithmic transformed-wavelength modulation spectroscopy in gas detection[J]. Infrared and Laser Engineering, 46, 0223001(2017).