| Influence of laser intensity in second-harmonic detection with tunable diode laser multi-pass absorption spectroscopy |
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| 作者姓名： | 阚瑞峰 董凤忠 张玉钧 刘建国 刘诚 王敏 高山虎 陈军 |
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| 作者单位： | Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;University of Science and Technology of China, Hefei 230026, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Hefei 230031, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 10274080) and the National High Technology Research and Development Program of China (Grant No 2003AA641010). |
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| 摘 要： | Tunable diode laser absorption spectroscopy （TDLAS） has been widely employed in atmospheric trace gases detection. The ratio of the second-harmonic signal to the intensity of laser beam incident to the multi-pass cell is proved to be proportional to the product of the path length and the gas concentration under any condition. A new calibration method based on this relation in TDLAS system for the measurement of trace gas concentration is proposed for the first time. The detection limit and the sensitivity of the system are below 110 and 31ppbv （parts-per-billion in volume）, respectively.
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| 关 键 词： | 可调二极管 激光技术 吸收光谱 谐函数 |
| 文章编号： | 1009-1963/2005/14（09）/1904-06 |
| 收稿时间： | 2004-12-28 |
| 修稿时间： | 5/7/2005 12:00:00 AM |
Influence of laser intensity in second-harmonic detection with tunable diode laser multi-pass absorption spectroscopy |
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| Kan Rui-Feng,Dong Feng-Zhong,Zhang Yu-Jun,Liu Jian-Guo,Liu Cheng,Wang Min,Gao Shan-Hu and Chen Jun.Influence of laser intensity in second-harmonic detection with tunable diode laser multi-pass absorption spectroscopy[J].Chinese Physics B,2005,14(9):1904-1909. |
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| Authors: | Kan Rui-Feng Dong Feng-Zhong Zhang Yu-Jun Liu Jian-Guo Liu Cheng Wang Min Gao Shan-Hu and Chen Jun |
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| Abstract: | Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detection. The ratio of the second-harmonic signal to the intensity of laser beam incident to the multi-pass cell is proved to be proportional to the product of the path length and the gas concentration under any condition. A new calibration method based on this relation in TDLAS system for the measurement of trace gas concentration is proposed for the first time. The detection limit and the sensitivity of the system are below 110 and 31ppbv (parts-per-billion in volume), respectively. |
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| Keywords: | tunable diode laser absorption spectroscopy multi-pass cell harmonic detection wave-length modulation |
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