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首页> 外文期刊>Optics Letters >Common-mode noise self-suppressed 3-component fiber optic accelerometer based on low-reflectivity Bragg gratings
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Common-mode noise self-suppressed 3-component fiber optic accelerometer based on low-reflectivity Bragg gratings

机译：基于低反射率布拉格光栅的共模噪声自抑制3组件光纤加速度计

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摘要

Common-mode noises (CMNs) are frequent in the fiber optic accelerometer, and their suppression is extremely important, particularly in the ultra-weak signal detection application, e.g., micro-seismic monitoring. This Letter proposes a 3-component (3C) low-reflectivity fiber Bragg gratings accelerometer for CMN self-suppression. When compared with the traditional CMN suppression method, the proposed 3C accelerometer is able to improve the CMN suppression effect by an average value larger than 4.5 dB in three axes, as well as double the effective signal amplitude due to the push-pull structure, which brings an enhanced signal-to-noise ratio. Besides, the proposed 3C accelerometer does not need an additional reference interferometer to achieve such a CMN suppression effect; hence, it largely reduces the volume and cost of the sensing system, which shows huge advantages, particularly in the large-scale quasi-distributed array. The proposed 3C accelerometer provides a promising candidate for the weak vector vibration detection. (C) 2021 Optical Society of America
机译：共模噪声（CMN）在光纤加速度计中非常常见，其抑制非常重要，尤其是在超微弱信号检测应用中，例如微地震监测。本文提出了一种用于CMN自抑制的三分量（3C）低反射率光纤布拉格光栅加速度计。与传统的CMN抑制方法相比，所提出的3C加速度计能够在三个轴上提高CMN抑制效果，平均值大于4.5 dB，并且由于推挽结构，有效信号振幅增加了一倍，从而提高了信噪比。此外，建议的3C加速度计不需要额外的参考干涉仪来实现这种CMN抑制效果；因此，它大大降低了传感系统的体积和成本，显示出巨大的优势，尤其是在大规模准分布式阵列中。所提出的3C加速度计为微弱矢量振动检测提供了一种很有前途的选择。（2021）美国光学学会

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  • 来源
    《Optics Letters》 |2021年第7期|共4页
  • 作者

    Liu Fei; Yi Duo; Chen Yi; Xu Ping; Zhang Min; Zhu Xuewen; He Xiangge; Zhou Xian; Long Keping;

  • 作者单位

    Univ Sci &

    Technol Beijing Sch Comp &

    Commun Engn Beijing 100083 Peoples R China;

    Shenzhen Univ Coll Phys &

    Optoelect Engn Shenzhen 518060 Peoples R China;

    Zhejiang Univ Coll Informat Sci &

    Elect Engn Hangzhou 310027 Peoples R China;

    Zhejiang Univ Coll Informat Sci &

    Elect Engn Hangzhou 310027 Peoples R China;

    Peking Univ Beijing Int Ctr Gas Hydrate Beijing 100871 Peoples R China;

    Zhejiang Univ Coll Informat Sci &

    Elect Engn Hangzhou 310027 Peoples R China;

    Peking Univ Beijing Int Ctr Gas Hydrate Beijing 100871 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Comp &

    Commun Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Comp &

    Commun Engn Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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