Investigation and optimization of a line-locked quartz enhanced spectrophone for rapid carbon dioxide measurement | |
H. Zhang; W. Jin; M. Hu; M. Hu; J. Liang and Q. Wang | |
刊名 | Sensors |
2021 | |
卷号 | 21期号:15 |
ISSN号 | 14248220 |
DOI | 10.3390/s21155225 |
英文摘要 | We have developed a rapid quartz enhanced spectrophone for carbon dioxide (CO2) measurement, in which the laser wavelength was tightly locked to a CO2 absorption line and a custom quartz tuning fork (QTF) operating at 12.5 kHz was employed. The intrinsic QTF oscillation-limited response time, as well as the optimal feedback interval, was experimentally investigated. By tightly locking the laser to the R(16) transition of CO2, we obtained a stable laser operation with its center wavelength variation kept within 0.0002 cm1, merely three times the laser linewidth. The reported CO2 sensor achieved a detection limit of 7 ppm, corresponding to a normalized noise equivalent absorption coefficient (NNEA) of 4.7 109 Wcm1Hz1/2, at a response time of 0.5 s. The detection limit can be further improved to 0.45 ppm at an integration time of 270 s, illustrating a good system stability. This spectrophone enables the realization of compact and fast-response gas sensors for many scenarios, where CO2 concentration from sub-ppm to hundreds of thousands of ppm is expected. 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URL标识 | 查看原文 |
内容类型 | 期刊论文 |
源URL | [http://ir.ciomp.ac.cn/handle/181722/65358] |
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 | H. Zhang,W. Jin,M. Hu,et al. Investigation and optimization of a line-locked quartz enhanced spectrophone for rapid carbon dioxide measurement[J]. Sensors,2021,21(15). |
APA | H. Zhang,W. Jin,M. Hu,M. Hu,&J. Liang and Q. Wang.(2021).Investigation and optimization of a line-locked quartz enhanced spectrophone for rapid carbon dioxide measurement.Sensors,21(15). |
MLA | H. Zhang,et al."Investigation and optimization of a line-locked quartz enhanced spectrophone for rapid carbon dioxide measurement".Sensors 21.15(2021). |
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