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首页> 外文期刊>Infrared physics and technology >A hollow-core photonic band-gap fiber based methane sensor system capable of reduced mode interference noise
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A hollow-core photonic band-gap fiber based methane sensor system capable of reduced mode interference noise

机译：一种能够减小模型干扰噪声的空心芯光子带式间隙纤维系统

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摘要

The performances of infrared absorption spectroscopic gas sensors using a hollow-core photonic band-gap fiber (HC-PBF) as an absorption cell are usually limited by mode interference of the multimode HC-PBF. To minimize the effect of mode interference, a free space coupling structure was proposed for mode transfer from a single mode fiber (SMF) to a HC-PBF and also from the HC-PBF to a photo-detector. The parameters of the free space coupling structure were optimized based on a detailed theoretical analysis and numerical simulation, and the mode inference reduction was experimentally verified. Wavelength modulation spectroscopy (WMS) combined with the second harmonic (2J) detection was utilized in methane (CH4) measurements by targeting an absorption line at 1653 nm. Using a similar to 2 mW laser and a 0.45 m-long HC-PBF for CH4 detection at atmospheric pressure, the optimized sensor demonstrated a 1 sigma detection limit of similar to 4.35 parts per million in volume (ppmv) with a 0.5 s averaging time and a minimum detection limit of similar to 360 parts per billion in volume (ppbv) with an averaging time of 75 s. The proposed structure can also be used in a HC-PBF-cell based infrared absorption gas sensor system for the detection of any gas species for suppression of mode interference.
机译：红外吸收光谱气体传感器的性能使用中空核心光子带 - 间隙纤维（HC-PBF）作为吸收电池通常通过多模HC-PBF的模式干扰限制。为了使模式干扰的效果最小化，提出了从单模光纤（SMF）到HC-PBF的模式转移到HC-PBF到光检测器的模式转移。基于详细的理论分析和数值模拟优化了自由空间耦合结构的参数，并且通过实验验证了模式推断减少。通过靶向1653nm的吸收管线，利用波长调制光谱（WMS）与第二次谐波（2J）检测进行使用，通过靶向甲烷（CH 4）测量。在大气压下使用类似于2 MW激光和0.45米长的HC-PBF，优化的传感器展示了1个类似于4.35份（PPMV）的1 Sigma检测限，具有0.5秒的平均时间最小检测限与平均时间为75秒的360亿万亿磅（PPBV）。所提出的结构也可以用于基于HC-PBF-Cell基的红外吸收气体传感器系统，用于检测任何用于抑制模式干扰的气体物种。

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  • 来源
    《Infrared physics and technology》 |2019年第2019期|共7页
  • 作者

    Hu Lien; Zheng Chuantao; Yao Dan; Yu Di; Liu Zhiwei; Zheng Jie; Wang Yiding; Tittel Frank K.;

  • 作者单位

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Rice Univ Dept Elect &

    Comp Engn 6100 Main St Houston TX 77005 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 红外线;红外技术及仪器;
  • 关键词

    Hollow-core photonic band-gap fiber; Mode interference; Wavelength modulation spectroscopy (WMS); Free space coupling;

    机译：空心核光电带空隙纤维;模式干扰;波长调制光谱（WMS）;自由空间耦合;

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