| Fiber-distributed multi-channel open-path H_2S sensor based on tunable diode laser absorption spectroscopy |
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| 作者姓名： | 陈东 刘文清 张玉钧 刘建国 阚瑞峰 王敏 方曦 崔益本 |
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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，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，Key Laboratory of Environmental Optics & Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (No. 50534050)，the Funds of the Chinese Academy of Sciences for Key Topics in Innovation Engineering (No. KJCX2-SW-W27). |
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| 摘 要： | Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy (TDLAS) is developed, the laser used is a telecommunication near infrared distributed feed-back (DFB) tunable diode laser, combining with wavelength modulation spectroscopy technology, a detection limit of 20 ppm·m is demonstrated. Multi-channel detection is achieved by combining optical fiber technique. An on-board reference cell provides on-line sensor calibration and almost maintenance-free operation. The sensor is suitable for large area field H2S monitoring application.
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