• Laser & Optoelectronics Progress
  • Vol. 57, Issue 21, 210002 (2020)
Yuben Bao, Junqiang Sun*, and Qiang Huang
Author Affiliations
  • 华中科技大学武汉光电国家研究中心, 湖北 武汉 430074
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    Abstract

    Brillouin optical time domain reflection (BOTDR) technique is a kind of simultaneous sensing technology for temperature and strain that has numerous applications and huge potentials. Compared with other sensing technologies, BOTDR has the following advantages: high accuracy, convenient layout, large dynamic range, and long measurement distance. This study introduces the principle of BOTDR and illustrates its main performance indexes. Additionally, new developments and key advances in BOTDR sensing for decades are reviewed, including improvement of spatial resolution, expansion of measurement distance, improvement of measurement accuracy, reduction of measurement time, as well as the solution of temperature and strain cross-sensitivity. Moreover, the examples of BOTDR application are introduced from the structural health monitoring of infrastructure and the pre-warning of geological disaster, and their characteristics are discussed. A typical BOTDR is advanced, and the developing trend in future will be characterized by the improvement of software, field-engineering application, and combination of multiple platforms.

    1 引言

    光纤传感技术自20世纪70年代诞生以来,便受到科研从业者的关注和研究,是一种极具潜力的传感技术。光纤传感因其传播介质的特点,拥有抗电磁干扰、绝缘性好、体积小、质量小、耐高温、抗腐蚀等优点。随着光纤制造业的成熟,光纤性能越来越好,价格也越来越便宜。这使得光纤传感开始走出实验室,更多地进入实际应用中。在所有的光纤传感中,分布式光纤传感器没有使用大量传感单元,而是直接使用光纤本身作为传感介质,具有结构简单、易生产、可复制性强的优点,可实现无死角、长距离、全天候的传感。

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    Bao Yuben, Sun Junqiang, Huang Qiang. Distributed Fiber Sensor Based on Brillouin Optical Time Domain Reflection Technique[J]. Laser & Optoelectronics Progress, 2020, 57(21): 210002
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    Category: Reviews
    Received: Jan. 15, 2020
    Accepted: --
    Published Online: Oct. 27, 2020
    The Author Email: Junqiang Sun (jqsun@hust.edu.cn)