Investigation and optimization of a line-locked quartz enhanced spectrophone for rapid carbon dioxide measurement

doi:10.3390/s21155225

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	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
	2021
发表期刊	Sensors
ISSN	14248220
卷号	21 期号:15
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.
DOI	10.3390/s21155225
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	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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