Institutional Repository of Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China
Laser frequency locking and intensity normalization in wavelength modulation spectroscopy for sensitive gas sensing | |
Wang, Guishi1; Mei, Jiaoxu1; Tian, Xing1; Liu, Kun1; Tan, Tu1; Chen, Weidong2; Gao, Xiaoming1 | |
2019-02-18 | |
发表期刊 | OPTICS EXPRESS |
ISSN | 1094-4087 |
摘要 | A novel method for laser frequency locking and intensity normalization in wavelength modulation spectroscopy (WMS)-based gas sensor system is reported. The center spacing between two second harmonic peaks demodulated from the rising and falling edges of a scanning triangular wave (for wavelength scan) is employed as a frequency locking reference. Amplitude of the directly acquired sine signal (for wavelength modulation) in the spectral region far away from the absorption feature is employed as an intensity normalization reference. A 50 ppm CH4:N-2 sample sealed in a multi-pass cell at 1 atm was employed as the target analyte for demonstration. The frequency locking significantly improves measurement accuracy. and the introduced intensity normalization method realized a similar to 3 times SNR improvement as compared to the commonly used 1f normalization method under frequency locking conditions. A minimum measurement precision of similar to 2.5 ppbv was achieved with a normalized noise equivalent absorption coefficient of 1.8 x 10(-9)cm(-1)Hz(-1/2). (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
DOI | 10.1364/OE.27.004878 |
关键词[WOS] | DIODE-LASER ; ABSORPTION-SPECTROSCOPY ; TEMPERATURE ; METHANE |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Key Research and Development Program of China[2017YFC0209700] ; National Key Research and Development Program of China[2016YFC0303900] ; National Natural Science Foundation of China[41730103] ; National Natural Science Foundation of China[61775221] ; National Natural Science Foundation of China[41405022] |
项目资助者 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
WOS研究方向 | Optics |
WOS类目 | Optics |
WOS记录号 | WOS:000459152800103 |
出版者 | OPTICAL SOC AMER |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/42177 |
专题 | 中科院安徽光学精密机械研究所 |
通讯作者 | Wang, Guishi |
作者单位 | 1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei 230031, Anhui, Peoples R China 2.Univ Littoral Cote dOpale, Lab Physicochim Atmosphere, F-59140 Dunkerque, France |
第一作者单位 | 中科院安徽光学精密机械研究所 |
通讯作者单位 | 中科院安徽光学精密机械研究所 |
推荐引用方式 GB/T 7714 | Wang, Guishi,Mei, Jiaoxu,Tian, Xing,et al. Laser frequency locking and intensity normalization in wavelength modulation spectroscopy for sensitive gas sensing[J]. OPTICS EXPRESS,2019,27(4):4878-4885. |
APA | Wang, Guishi.,Mei, Jiaoxu.,Tian, Xing.,Liu, Kun.,Tan, Tu.,...&Gao, Xiaoming.(2019).Laser frequency locking and intensity normalization in wavelength modulation spectroscopy for sensitive gas sensing.OPTICS EXPRESS,27(4),4878-4885. |
MLA | Wang, Guishi,et al."Laser frequency locking and intensity normalization in wavelength modulation spectroscopy for sensitive gas sensing".OPTICS EXPRESS 27.4(2019):4878-4885. |
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