Detection Technology of H2S and CO2 Based on Fiber Amplifier Enhanced Photoacoustic Spectroscopy

Fengxiang, 马凤翔 Ma; Yu, 田宇 Tian; Ke, 陈珂 Chen; Bo, 张博 Zhang; Chenxi, 李辰溪 Li; Guangyin, 张广寅 Zhang; Min, 郭珉 Guo; Beilei, 杨蓓蕾 Yang; Yue, 赵跃 Zhao

doi:10.3788/aos202141.0703002

光学学报

2021

DOI: 10.3788/aos202141.0703002

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Detection Technology of H2S and CO2 Based on Fiber Amplifier Enhanced Photoacoustic Spectroscopy

马凤翔 Ma Fengxiang¹,

田宇 Tian Yu²,

陈珂 Chen Ke³

et al.

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Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy

Zhu,

Zeng,

Huang

et al. 2024

J. Phys. D: Appl. Phys.

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Photoacoustic spectroscopy (PAS) is highly valued in gas detection for its outstanding sensitivity and rapid response. Addressing its limited precision in trace gas analysis, scholars have taken numerous measures to optimize structural and modify the size of acoustic sensors and photoacoustic cells (PACs). Nevertheless, advancements in laser modulation remain understudied due to technical difficulties. This paper theoretically examines the effects of intensity modulation with square wave signals and wavelength modulation involving sawtooth and sinusoidal. In this paper, a theoretical approach is proposed to examine the effects of intensity modulation with square wave signals and wavelength modulation involving sawtooth and sinusoidal signals. Experimental measurements were performed using parameters obtained in preliminary experiments. We constructed an experimental setup with varied-length PACs to bolster experimental dependability, focusing on H2S as the target gas to compare the two laser modulation techniques. The results exhibited that at low frequencies, intensity modulation outperforms wavelength modulation. At resonance frequencies, however, wavelength modulation could provide stronger signals’ intensity. Modulation frequency considerations are therefore crucial when choosing a modulation method for PAS gas detection. Without specific frequency requirements, a second harmonic modulation at resonance is recommended. This study provides guidance on selecting laser modulation methods for PAS, potentially refining the technique’s application in trace gas analysis.

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Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy

Zhu,

Zeng,

Huang

et al. 2024

J. Phys. D: Appl. Phys.

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Detection of SF₆ Decomposition Components H₂S and CO₂ Based on WDM and CRDS

Lv,

Zhang,

Jiang

et al. 2024

IEEE Trans. Dielect. Electr. Insul.

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干涉型全光学光声光谱气体传感技术研究进展

Gong Zhenfeng,

Wu Guojie,

Xing Jiawei

et al. 2023

光学学报

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Detection Technology of H2S and CO2 Based on Fiber Amplifier Enhanced Photoacoustic Spectroscopy

Cited by 5 publications

References 0 publications

Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy

Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy

Detection of SF₆ Decomposition Components H₂S and CO₂ Based on WDM and CRDS

干涉型全光学光声光谱气体传感技术研究进展

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Detection Technology of H2S and CO2 Based on Fiber Amplifier Enhanced Photoacoustic Spectroscopy

Cited by 5 publications

References 0 publications

Influence of light source modulation on detection performance of trace-level SF6 fault gas using photoacoustic spectroscopy

Influence of light source modulation on detection performance of trace-level SF6 fault gas using photoacoustic spectroscopy

Detection of SF₆ Decomposition Components H₂S and CO₂ Based on WDM and CRDS

干涉型全光学光声光谱气体传感技术研究进展

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Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy

Influence of light source modulation on detection performance of trace-level SF₆ fault gas using photoacoustic spectroscopy