| 基于可调谐半导体激光器的甲烷气体监测技术 |
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| 引用本文： | 韦云波,印新达,江山,董雷.基于可调谐半导体激光器的甲烷气体监测技术[J].半导体光电,2012,33(2):295-298,302. |
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| 作者姓名： | 韦云波 印新达 江山 董雷 |
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| 作者单位： | 武汉邮电科学研究院,武汉430074／武汉理工光科股份有限公司,武汉430074;武汉理工光科股份有限公司,武汉,430074 |
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| 摘 要： | 介绍了一种利用分布反馈(DFB)可调谐半导体激光器吸收光谱技术(TDLAS)实现甲烷气体浓度监测系统。不同于直接测量气体吸收前后光源强度的变化值,TDLAS通过提取二次谐波幅值信息,在频域换算气体浓度,因此具有更高的稳定性和精确度。同时对不同输出特性的DFB半导体激光器进行对比研究,分析光源的波长调谐特性及功率-电流特性对实际应用的影响。
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| 关 键 词： | 甲烷气体监测 DFB可调谐半导体激光器 TDLAS |
Methane Monitoring Technology Using Tunable Diode Laser |
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| WEI Yunbo,YIN Xinda,JIANG Shan,DONG Lei.Methane Monitoring Technology Using Tunable Diode Laser[J].Semiconductor Optoelectronics,2012,33(2):295-298,302. |
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| Authors: | WEI Yunbo YIN Xinda JIANG Shan DONG Lei |
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| Affiliation: | 1.Wuhan Research Institute of Post and Telecommunication,Wuhan 430074,CHN; 2.WUTOS Technology Co.,Ltd.,Wuhan 430074,CHN) |
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| Abstract: | Tunable Diode Laser Absorption Spectroscopy(TDLAS) which is based on Distributed Feedback(Distributed Feedback,DFB) diode laser is used for methane concentration detection.By extracting the second harmonic of absorption spectrum,TDLAS can be more robust and reliable than the direct modulation.The impacts of some specifications of DFB laser diode,such as wavelength-tunable characteristics and "P-I" curve,are also investigated in this paper. |
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| Keywords: | methane gas monitoring tunable DFB diode laser TDLAS |
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