A novel wavelength modulation spectroscopy gas sensing technique with an ultra-compressed wavelength scanning bandwidth
文献类型：期刊论文
| 作者 | F. P. Wang; R. Liang; Q. S. Xue; Q. Wang; J. H. Wu; Y. P. Cheng; J. C. Sun and Q. Li |
| 刊名 | Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
 |
| 出版日期 | 2022 |
| 卷号 | 280页码:11 |
| ISSN号 | 1386-1425 |
| DOI | 10.1016/j.saa.2022.121561 |
| 英文摘要 | 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. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [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. |
入库方式： OAI收割
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。