| Research on the distributed optical remote sensing of methane employing single laser source |
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| 作者姓名： | 尹王保 马维光 汪丽蓉 赵建明 肖连团 贾锁堂 |
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| 作者单位： | College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006，College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006，College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006，College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006，College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006，College of Physics and Electronics Engineering，Sbanxi University，State Key Laboratory of Quantum Optics and Quantum Optics Devices，Taiyuan 030006 |
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| 基金项目： | This work was Partially supported by the National Natural Science Foundation of China(No.10174047，60078009)and the Natural Science Foundation of Shanxi Province(No.002096). |
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| 摘 要： | A design and testing of a cost-effective distributed optical remote sensing methane system, which will help one to detect gas leaks from multi-coal face in mines simultaneously, is presented. The fundamentals of the remote detection are based on frequency-modulation spectroscopy (FMS) and harmonic detection. By utilizing fiber-optic splitting technique and reference-signal restoring circuit, the remote sensing system is feasible to employ single laser source to get multi-spot measurement in the near infrared region so that the system described here shows sufficient sensibility, considerably increased reliability and marketability over the presently available system. The minimum measurable path-integrated concentration is estimated to be about 423 ppb-m by experimentation.
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