| 基于谐波检测原理的双光路CH4检测研究 |
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| 引用本文： | 张景超,管立君,肖长江,褚衍平. 基于谐波检测原理的双光路CH4检测研究[J]. 光电子．激光, 2007, 18(12): 1442-1444 |
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| 作者姓名： | 张景超 管立君 肖长江 褚衍平 |
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| 作者单位： | 燕山大学理学院,河北,秦皇岛,066004;燕山大学理学院,河北,秦皇岛,066004;燕山大学理学院,河北,秦皇岛,066004;燕山大学理学院,河北,秦皇岛,066004 |
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| 摘 要： | 基于谐波检测原理,研究了一种高灵敏度易于实现的近红外光谱吸收型光纤CH4气体传感器.系统采用分布反馈式(DFB)LD做光源,通过光源调制实现气体浓度的谐波检测,加入参考光路和参考气室,利用2个二次谐波的比值作为系统输出,消除了光源波动和光路干扰的影响,建立了传感器的数学模型,给出了CH4气体测量系统的实验结果,实验表明,该仪器的检测灵敏度可以达到1×10-4.
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| 关 键 词： | 近红外吸收 双光路 谐波检测 CH4 |
| 文章编号： | 1005-0086(2007)12-1442-03 |
| 修稿时间： | 2007-01-19 |
Research on Two Optical Path CH4 Sensor Based on Harmonic Detection |
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| ZHANG Jing-chao,GUAN Li-jun,XIAO Chang-jiang,CHU Yan-ping. Research on Two Optical Path CH4 Sensor Based on Harmonic Detection[J]. Journal of Optoelectronics·laser, 2007, 18(12): 1442-1444 |
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| Authors: | ZHANG Jing-chao GUAN Li-jun XIAO Chang-jiang CHU Yan-ping |
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| Affiliation: | ZHANG Jing-chao,GUAN Li-jun,XIAO Chang-jiang,CHU Yan-ping(College of Science,Yanshan University,Qinhuangdao 066004,China) |
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| Abstract: | Based on harmonic detection,a system using near-infrared spectral absorption for high sensitivity and easy-realizable methane detection is demonstrated.Distribute feedback laser diode (DFB-LD) is used as a light source.Gas concentration harmonic detection is achieved by light source modulation.The referenced optical path and referenced gas cell are appended.The ratio of two second harmonic signals is regarded as the output of system.The influence of light power changing and optical path interference is elim... |
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| Keywords: | near-infrared absorption two optical path harmonic detection CH4 |
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