[1] TANG Ju, YANG Xu, YANG Dong et al. Using SF6 decomposed component analysis for the diagnosis of partial discharge severity initiated by free metal particle defect[J]. Energies, 10, 1119(2017).

[2] CUI Ruyue, DONG Lei, WU Hongpeng et al. Highly sensitive and selective CO sensor using a 233 μm diode laser and wavelength modulation spectroscopy[J]. Optics Express, 26, 24318(2018).

[3] PENG Wei. Comparison of the application of my country's SF6 gas standard and IEC related standards[J]. Electric Power Equipment, 61-63(2008).

[4] MA Fengxiang, TIAN Yu, CHEN Ke et al. Detection technology of H2S and CO2 based on fiber amplifier enhanced photoacoustic spectroscopy[J]. Acta Optics Sinica, 41, 0730002(2021).

[5] ZHANG Xiaoxing, ZHANG Yin, TANG Ju et al. Optical technology for detecting the decomposition products of SF6: a review[J]. Optical Engineering, 57, 110901(2018).

[6] LIU Changlei. Application of gas chromatography in gas safety analysis of petrochemical enterprises[J]. Qilu Petrochemical, 44, 243-245(2016).

[7] OLTHOFF J, VANBRYNT J, HERRON T et al. Detection of trace disulfur decafluoride in sulfur hexafluoride by gas chromatography/mass spectrometry[J]. Analytical Chemistry, 63, 726-732(1991).

[8] CHEN Changlun, HE Jianbo, LIU Wei et al. Research progress of electrochemical gas sensors[J]. Sensor World, 11-15(2004).

[9] DONG Ming, ZHANG Chongxing, REN Ming et al. Electrochemical and infrared absorption spectroscopy detection of SF6 decomposition products[J]. Sensors, 17, 2627(2017).

[10] YIN Xukun, DONG Lei, WU Hongping et al. Sub-ppb nitrogen dioxide detection with a large linear dynamic range by use of a differential photoacoustic cell and a 3.5W blue multimode diode laser[J]. Sensors and Actuators B: Chemical, 247, 329-335(2017).

[11] ZHENG Huadan, LOU Minhan, DONG Lei et al. Compact photoacoustic module for methane detection incorporating interband cascade light emitting device[J]. Optics Express, 25, 16761-16770(2017).

[12] CHEN Ke, ZHANG Bo, GUO Min et al. All-optical photoacoustic multigas analyzer using digital fiber-optic acoustic detector[J]. IEEE Transactions on Instrumentation and Measurement, 69, 8486-8493(2020).

[13] CHEN Ke, ZHANG Bo, LIU Shuai et al. Parts-per-billion-level detection of hydrogen sulfide based on near-infrared all-optical photoacoustic spectroscopy[J]. Sensors and Actuators B: Chemical, 283, 1-5(2019).

[14] CUI Zhaolun, ZHANG Xiaoxing, CHENG Zheng et al. Quantitative analysis of SO2, H2S and CS2 mixed gases based on ultraviolet differential absorption spectrometry[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 215, 187-195(2019).

[15] LUO Jin, FANG Yonghua, ZHAO Yandong et al. Research on the detection of SF6 decomposition products based on non-resonant photoacoustic spectroscopy[J]. Analytical Methods, 7, 1200-1207(2015).

[16] MA Fengxiang, TIAN Yu, CHEN Ke et al. Detection technology of H2S and CO2 based on optical fiber amplification enhanced photoacoustic spectroscopy[J]. Acta Optics Sinica, 41, 0703002(2017).

[17] Shenlong CHA, LIU Kun, TAN Tu et al. Application of photoacoustic spectroscopy in multi-component gas concentration detection[J]. Acta Photonica Sinica, 46, 0612002(2017).

[18] YU Rong, JIANG Yuesong. Photoacoustic spectroscopy system with amplitude spectrum and phase spectrum measurement functions[J]. Acta Optica Sinica, 34, 0230001(2014).

[19] WANG Qiang, XU Ke, YAO Yuchen et al. Recent advances of power-enhanced photoacoustic spectroscopy for gas sensing[J]. Chinese Journal of Lasers, 45, 0911008(2018).

[20] YUAN Shuai, WANG Guangzhen, FU Dehui et al. Cross interference characteristics of photoacoustic spectroscopy multi-gas analyzer[J]. Acta Photonica Sinica, 50, 0430002(2021).

[21] WANG Shutao, CHE Rensheng, WANG Yutian et al. Research on optical fiber gas sensor based on photoacoustic spectroscopy[J]. China Journal of Laser, 31, 979-982(2004).

[22] WU Hongping, DONG Lei, ZHENG Huadan et al. Enhanced near-infrared QEPAS sensor for sub-ppm level H2S detection by means of a fiber amplified 1 582 nm DFB laser[J]. Sensors and Actuators B: Chemical, 221, 666-672(2015).

[23] ZHANG Xiaoxing, CHENG Zheng, LI Xin. Cantilever enhanced photoacoustic spectrometry: quantitative analysis of the trace H2S produced by SF6 decomposition[J]. Infrared Physics & Technology, 78, 31-39(2016).

[24] YIN Xukun, DONG Lei, WU Hongfu et al. Ppb-level H2S detection for SF6 decomposition based on a fiber-amplified telecommunication diode laser and a background-gas-induced high- Q photoacoustic cell[J]. Applied Physics Letters, 111, 031109(2017).

[25] YIN Xukun, DONG Lei, WU Hongping et al. Highly sensitive photoacoustic multicomponent gas sensor for SF6 decomposition online monitoring[J]. Optics Express, 27, A224(2019).

[26] CHEN Ke, YUAN Shuai, GONG Zhenfeng et al. High sensitive detection for SF6 decomposition component of H2S based on laser photoacoustic spectroscopy[J]. Chinese Journal of Lasers, 45, 0911012(2018).

[27] CHEN Ke, ZHANG Bo, LIU Shuai et al. Parts-per-billion-level detection of hydrogen sulfide based on near-infrared all-optical photoacoustic[J]. Sensors and Actuators B: Chemical, 283, 1-5(2019).

[28] ZHAO Nan, LIU Yang, ZHAO Ningyang et al. Establishment and optimization of photoacoustic cell model in photoacoustic spectrum detection system[J]. Acta Photonica Sinica, 50, 0730001(2021).

[29] CHEN Ke, YANG Beilei, GUO Min et al. Fiber-optic photoacoustic gas sensor with temperature self-compensation[J]. Optics Letters, 45, 2458-2461(2020).

[30] CHEN Ke, YU Zhihao, GONG Zhenfeng et al. Lock-in white-light-interferometry-based all-optical photoacoustic spectrometer[J]. Optics Letters, 43, 5038-5041(2018).

[31] CHEN Ke, GUO Min, YANG Beilei et al. Highly sensitive optical fiber photoacoustic sensor for in situ detection of dissolved gas in oil[J]. IEEE Transactions on Instrumentation & Measurement, 70, 1-8(2021).

[32] ZHAO Xinyu, CHEN Ke, CUI Dongyu et al. Ultra-high sensitive photoacoustic gas detector based on differential multi-pass cell[J]. Sensors and Actuators B: Chemical, 368, 132124(2022).

[33] HERRIOTT D, KOGELNIK H, KOMPFNER R. Off-axis paths in spherical mirror interferometers[J]. Applied Optics, 3, 523-526(1964).

[34] ZHANG Zhenxi, ZHOU Hongguang, CHEN Xufei et al. Design method of variable optical path length multi-pass cell[J]. Applied Physics B, 127, 12(2021).