[1] Zheng W X, Zheng C T, Yao D et al. Development of a mid-infrared interband cascade laser methane sensor[J]. Acta Optica Sinica, 38, 0328013(2018).

[2] Chen K, Yuan S, Gong Z F et al. Ultra-high sensitive photoacoustic spectrometer for trace gas detection based on fiber-optic acoustic sensors[J]. Acta Optica Sinica, 38, 0328015(2018).

[3] Kosterev A A, Bakhirkin Y A, Curl R F et al. Quartz-enhanced photoacoustic spectroscopy[J]. Optics Letters, 27, 1902-1904(2002).

[4] Patimisco P, Sampaolo A, Dong L et al. Recent advances in quartz enhanced photoacoustic sensing[J]. Applied Physics Reviews, 5, 011106(2018). http://www.researchgate.net/publication/322739642_Recent_advances_in_quartz-enhanced_photoacoustic_sensing

[5] Li C G, Dong L, Zheng C T et al. Ppbv-level ethane detection using quartz-enhanced photoacoustic spectroscopy with a continuous-wave, room temperature interband cascade laser[J]. Sensors, 18, 723(2018).

[6] Dong L, Wu H P, Zheng H D et al. Double acoustic microresonator quartz-enhanced photoacoustic spectroscopy[J]. Optics Letters, 39, 2479-2482(2014).

[7] Jiang M, Feng Q L, Liang T L et al. Recent advances in quartz-enhanced photoacoustic spectrophone[J]. Laser & Optoelectronics Progress, 52, 090002(2015).

[8] Wu H, Sampaolo A, Dong L et al. Quartz enhanced photoacoustic H2S gas sensor based on a fiber-amplifier source and a custom tuning fork with large prong spacing[J]. Applied Physics Letters, 107, 111104(2015).

[9] Liu K, Guo X Y, Yi H M et al. Off-beam quartz-enhanced photoacoustic spectroscopy[J]. Optics Letters, 34, 1594-1596(2009).

[10] Dong L, Kosterev A A, Thomazy D et al. QEPAS spectrophones: design, optimization, and performance[J]. Applied Physics B, 100, 627-635(2010).

[11] Yang X T, Xiao Y H, Ma Y F et al. A miniaturized QEPAS trace gas sensor with a 3D-printed acoustic detection module[J]. Sensors, 17, 1750(2017).

[12] Chen J J, Wang G S, Liu K et al. Calibration-free wavelength modulation absorption spectroscopy for acetylene detection[J]. Acta Optica Sinica, 38, 0930001(2018).

[13] Kosterev A A, Tittel F K, Serebryakov D V et al. Applications of quartz tuning forks in spectroscopic gas sensing[J]. Review of Scientific Instruments, 76, 043105(2005).

[14] Dong L, Ma W G, Zhang L et al. Mid-IR ultra-sensitive CO detection based on pulsed quartz enhanced photoacoustic spectroscopy[J]. Acta Optica Sinica, 34, 0130002(2014).

[15] Hu L, Zheng C T, Zheng J et al. Quartz tuning fork embedded off-beam quartz-enhanced photoacoustic spectroscopy[J]. Optics Letters, 44, 2562-2565(2019).