Changchun Institute of Optics,Fine Mechanics and Physics,CAS
| A novel wavelength modulation spectroscopy gas sensing technique with an ultra-compressed wavelength scanning bandwidth | |
| F. P. Wang; R. Liang; Q. S. Xue; Q. Wang; J. H. Wu; Y. P. Cheng; J. C. Sun and Q. Li | |
| 2022 | |
| 发表期刊 | Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
 |
| ISSN | 1386-1425 |
| 卷号 | 280页码:11 |
| 摘要 | In a wavelength modulation spectroscopy (WMS) gas sensing system, a scanning ramp combined with a high frequency sinusoidal signal is applied to drive the laser source. Generally, a wide wavelength scanning bandwidth realized by voltage scanning ramp is required to fully cover the target gas absorption profile. In this paper, a novel WMS-based strategy is proposed and verified in a CH4 detection system. The wavelength scanning bandwidth is compressed from similar to 659 pm to similar to 166 pm, even narrower than the half width at full height (HWFM) of the CH4 absorption profile. In addition, the second harmonic signal that induced by the absorption is increased threefold by virtue of making full use of the dynamic range of the preamplifier circuit, and the waveform distortion that comes from the residual amplitude modulation (RAM) effect is eliminated as well. Benefiting from the compressed driving current range, the thermal stability of the laser diode is improved from the original level of 0.5 degrees C to 0.1 degrees C. As a result, a linear sensitivity of 75.2 ppb is achieved within 0-3000 ppm CH4 concentration range at 12.7 s time constant. |
| DOI | 10.1016/j.saa.2022.121561 |
| URL | 查看原文 |
| 收录类别 | sci ; ei |
| 语种 | 英语 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ciomp.ac.cn/handle/181722/66921 |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | F. P. Wang,R. Liang,Q. S. Xue,et al. A novel wavelength modulation spectroscopy gas sensing technique with an ultra-compressed wavelength scanning bandwidth[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2022,280:11. |
| APA | F. P. Wang.,R. Liang.,Q. S. Xue.,Q. Wang.,J. H. Wu.,...&J. C. Sun and Q. Li.(2022).A novel wavelength modulation spectroscopy gas sensing technique with an ultra-compressed wavelength scanning bandwidth.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,280,11. |
| MLA | F. P. Wang,et al."A novel wavelength modulation spectroscopy gas sensing technique with an ultra-compressed wavelength scanning bandwidth".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 280(2022):11. |
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| A novel wavelength m（5744KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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