Highly sensitive photoacoustic gas sensor based on near-concentric cavity
文献类型：期刊论文
| 作者 | Si, Ganshang2; Wang, Yanchun2; Liu, Xu2; Sun, Changwei2; Xu, Haichun1; Li, Zhengang1 |
| 刊名 | OPTICS EXPRESS
 |
| 出版日期 | 2024-06-17 |
| 卷号 | 32 |
| ISSN号 | 1094-4087 |
| DOI | 10.1364/OE.525307 |
| 通讯作者 | Li, Zhengang(lzgyx@mail.ustc.edu.cn) |
| 英文摘要 | The precise detection of trace gases in the atmosphere is vital for both environmental preservation and human health. Addressing the inherent challenges in enhancing the sensitivity of photoacoustic spectroscopy, a highly sensitive photoacoustic gas detection method utilizing a nearconcentric cavity was proposed. By constructing a near-concentric optical cavity, laser reflections within the photoacoustic cell were substantially amplified, resulting in enhanced sensitivity of photoacoustic signal detection. Additionally, to align with the optical path characteristics of the near-concentric cavity, a miniaturized dumbbell-like photoacoustic cell was designed. Characterized by its high-frequency resonance, this design effectively mitigated background noise while maintaining a high sound pressure level. Experimental results demonstrated a remarkable enhancement in both signal intensity and signal-to-noise ratio by factors of 22.06 and 21.26, respectively, compared to traditional excitation methods. According to the 1 sigma standard, with a laser power of 21 mW, the setup achieved a detection limit of 10.15 ppb for NO2. The corresponding normalized noise equivalent absorption was calculated to be 2.84 x 10-9 cm-1WHz-1/2, with a gas consumption rate of merely 15.19 mL. |
| WOS关键词 | CH4 |
| 资助项目 | Natural Science Research Project for Anhui Universities[2022AH040256] ; Anhui Key Research and Devel-opment Program[2023n06020057] ; Natural Science Innovation Team of Anhui Provincial Universities[2023AH010065] |
| WOS研究方向 | Optics |
| 语种 | 英语 |
| WOS记录号 | WOS:001253476700010 |
| 出版者 | Optica Publishing Group |
| 资助机构 | Natural Science Research Project for Anhui Universities ; Anhui Key Research and Devel-opment Program ; Natural Science Innovation Team of Anhui Provincial Universities |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/136611]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Li, Zhengang |
| 作者单位 | 1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Bengbu Univ, Sch Elect & Elect Engn, Bengbu 233030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Si, Ganshang,Wang, Yanchun,Liu, Xu,et al. Highly sensitive photoacoustic gas sensor based on near-concentric cavity[J]. OPTICS EXPRESS,2024,32. |
| APA | Si, Ganshang,Wang, Yanchun,Liu, Xu,Sun, Changwei,Xu, Haichun,&Li, Zhengang.(2024).Highly sensitive photoacoustic gas sensor based on near-concentric cavity.OPTICS EXPRESS,32. |
| MLA | Si, Ganshang,et al."Highly sensitive photoacoustic gas sensor based on near-concentric cavity".OPTICS EXPRESS 32(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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