| 基于波长调制技术的内腔式气体传感研究 |
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| 引用本文： | 刘琨,刘铁根,江俊峰,梁霄,贾大功,张红霞,汪曣,井文才,张以谟.基于波长调制技术的内腔式气体传感研究[J].中国激光,2011(1). |
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| 作者姓名： | 刘琨 刘铁根 江俊峰 梁霄 贾大功 张红霞 汪曣 井文才 张以谟 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室; |
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| 基金项目： | 国家973计划(2010CB327802); 中国博士后科学基金(20090460690,201003298); 国家自然科学基金(30770597); 教育部博士点新教师基金(200800561020,200800561022); 天津大学青年教师培养基金(TJU-YFF-08B47)资助课题 |
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| 摘 要： | 气体传感理论和实验研究已成为当今光纤传感领域的热点之一。波长调制法和有源内腔法是提高气体传感灵敏度的两种有效方式。结合上述两种气体传感方法,构建一个基于波长调制技术的内腔式气体传感系统。讨论气体吸收光谱二次谐波分量与气体浓度之间的函数关系,从理论和实验两方面确定系统的最佳参数。利用提取多条吸收谱线的二次谐波分量,采用平均算法进一步提高系统灵敏度,进行乙炔气体传感的灵敏度可达7.5×10-5。以光纤光栅作为波长参考,建立系统的波长-电压响应曲线,进而检测气体的吸收波长值。进行乙炔气体传感时吸收波长检测的绝对误差不超过0.445 nm。
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| 关 键 词： | 气体传感 灵敏度 吸收波长 波长调制 有源内腔 |
Investigation of Intra-Cavity Gas Sensing Technology Based on Wavelength Modulation |
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| Liu Kun Liu Tiegen Jiang Junfeng Liang Xiao Jia DagongZhang Hongxia Wang Yan Jing Wencai Zhang Yimo.Investigation of Intra-Cavity Gas Sensing Technology Based on Wavelength Modulation[J].Chinese Journal of Lasers,2011(1). |
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| Authors: | Liu Kun Liu Tiegen Jiang Junfeng Liang Xiao Jia DagongZhang Hongxia Wang Yan Jing Wencai Zhang Yimo |
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| Affiliation: | Liu Kun Liu Tiegen Jiang Junfeng Liang Xiao Jia DagongZhang Hongxia Wang Yan Jing Wencai Zhang Yimo(Key Laboratory of Opto-Electronics Information and Technical Science,Ministry of Education,College of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Theoretical and experimental research of gas sensing technique is one of the focus in modern fiber sensing area.Wavelength modulation and active intra-cavity methods are two effective ways which increase the sensitivity obviously.Combined with these two methods,an intra-cavity gas sensing system based on wavelength modulation technique(WMT) is established.The relationship between the second-harmonic component of gas absorption spectra and concentration is investigated.And then the optimized parameters of th... |
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| Keywords: | gas sensing sensitivity absorption wavelength wavelength modulation active intra-cavity |
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