[2] Durry G. Balloon-borne near-infrared diode laser spectroscopy for in situ measurements of atmospheric CH4 and H2O[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 57, 1855-1863(2001).

[3] Webber M E. AacDonald T, Pushkarsky M B, et al. Agricultural ammonia sensor using diode lasers and photoacoustic spectroscopy[J]. Measurement Science and Technology, 16, 1547-1553(2005).

[4] Chen K, Yuan S, Gong Z F et al. High sensitive detection for SF6 decomposition component of H2S based on laser photoacoustic spectroscopy[J]. Chinese Journal of Lasers, 45, 0911012(2018).

[5] Menzel L, Kosterev A A, Curl R F et al. Spectroscopic detection of biological NO with a quantum cascade laser[J]. Applied Physics B, 72, 859-863(2001).

[6] Liu X, Zhang T, Zhang G et al. Carbon monoxide detection based on photoacoustic spectroscopy[J]. Chinese Journal of Lasers, 47, 0111002(2020).

[7] Zha S L, Ma H L, Zha C L et al. Application of broadband photoacoustic spectroscopy in methane concentration detection[J]. Laser & Optoelectronics Progress, 56, 043001(2019).

[8] Brand C, Winkler A, Hess P et al. Pulsed-laser excitation of acoustic modes in open high-Q photoacoustic resonators for trace gas monitoring: results for C2H4[J]. Applied Optics, 34, 3257-3266(1995).

[9] Schilt S, Thévenaz L, Niklès M et al. Ammonia monitoring at trace level using photoacoustic spectroscopy in industrial and environmental applications[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 60, 3259-3268(2004).

[10] Thöny A, Sigrist M W. New developments in CO2-laser photoacoustic monitoring of trace gases[J]. Infrared Physics & Technology, 36, 585-615(1995).

[11] Yun Y X, Zhao X X, Chen W G et al. Acetylene detection by laser resonant photoacoustic spectrometry[J]. High Voltage Engineering, 35, 2156-2162(2009).

[12] Shi B X, Hu K. Design of Helmholtz resonant photoacoustic cell[J]. Journal of Zhejiang University, 19, 79-89(1985).

[13] Zeninari V, Kapitanov V A, Courtois D et al. Design and characteristics of a differential Helmholtz resonant photoacoustic cell for infrared gas detection[J]. Infrared Physics & Technology, 40, 1-23(1999).

[14] Guo H, Wang X B, Zuo D L et al. Research of SF6 detection by means of differential photoacoustic spectroscopy with tunable CO2 laser[J]. Laser Technology, 42, 593-598(2018).

[15] Zéninari V, Parvitte B, Courtois D et al. Methane detection on the sub-ppm level with a near-infrared diode laser photoacoustic sensor[J]. Infrared Physics & Technology, 44, 253-261(2003).

[16] Baumann B, Kost B, Wolff M et al. Numerical shape optimization of photoacoustic sample cells: first results. [C]//Proceedings of the European COMSOL Conference. Grenoble, France: [s.n.], 1-6(2007).

[17] Zhao Y D, Fang Y H, Li Y Y et al. Theoretical research on quartz enhanced photoacoustic spectroscopy base on the resonance in an elliptical cavity[J]. Acta Physica Sinica, 65, 190701(2016).

[18] Kost B, Baumann B, Germer M et al. Numerical shape optimization of photoacoustic resonators[J]. Applied Physics B, 102, 87-93(2011).

[19] Ulasevich A L, Gorelik A V, Kouzmouk A A et al. A miniaturized prototype of resonant banana-shaped photoacoustic cell for gas sensing[J]. Infrared Physics & Technology, 60, 174-182(2013).

[20] Ulasevich A L, Gorelik A V, Kouzmouk A A et al. A compact resonant Π-shaped photoacoustic cell with low window background for gas sensing[J]. Applied Physics B, 117, 549-561(2014).

[21] Haouari R, Rochus V, Lagae L et al. Topology optimization of an acoustical cell for gaseous photoacoustic spectroscopy using COMSOL multiphysics. [C]//Proceedings of the COMSOL Conference.[S.l.:s.n.], 1-6(2017).

[22] Cheng G, Cao Y, Liu K et al. Numerical calculation and optimization of photoacoustic cell for photoacoustic spectrometer[J]. Acta Physica Sinica, 68, 074202(2019).

[23] VDI-Gesellschaft V C, Verein D I. VDI-Wärmeatlas: berechnungsblätter für den Wärmeübergang[M]. Berlin: Springer, 13-27(2002).

[24] Miklós A, Hess P, Bozóki Z. Application of acoustic resonators in photoacoustic trace gas analysis and metrology[J]. Review of Scientific Instruments, 72, 1937-1955(2001).

[25] Bijnen F G C, Reuss J, Harren F J M. Geometrical optimization of a longitudinal resonant photoacoustic cell for sensitive and fast trace gas detection[J]. Review of Scientific Instruments, 67, 2914-2923(1996).