长距离布里渊光时域反射光纤传感技术进展
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武汉市科技计划项目(No.2018010401011272);湖南省科技计划重点项目(No.2016TP1023);湖南省教育厅资助科研项目(No.17B239)资助


Advances of technologies in long-range Brillouin optical time-domain reflective optical fiber sensing
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    摘要:

    大型桥梁坍塌、建筑物倾斜、冰灾造成输电杆塔倒塌大范围停电等自然灾害新闻屡见不鲜,对类似这些设施的监测研究成为热点。布里渊光时域反射(BOTDR)光纤传感具有分布式温度/应变同时传感、单端注入与测量等优点而被人们广泛采用。本文针对长距离光纤传感应用场景,分析了BOTDR传感机理;综述了近20年以来10 km及以上长距离BOTDR光纤传感系统的发展和关键技术;总结了基于数据处理、脉冲编码、多波长探测、高消光比调制、拉曼、窄线宽光源、单光子探测技术改善BOTDR性能指标的基本原理及具体指标值。展望了进一步提高系统信噪比、空间分辨率、传感距离、缩短整个系统的测量时间,优化多个性能参数;进一步增加除温度/应变传感参量,提升系统功能;进一步解决温度/应变交叉敏感问题都将成为长距离BOTDR系统今后的发展方向。

    Abstract:

    In recent years,the health monitoring of large bridges,buildings and transmission towers has become a research hotspot.Brillouin optical time-domain reflection(BOTDR)fiber sensing is widely used because of its advantages of distributed temperature/strain simultaneous sensing,single-ended injection and measurement.In this paper,we review the mechanism of BOTDR sensing for long-range fiber sensing applications;the development and key technologies and specific indicator values of 10 km and above long-distance BOTDR fiber sensing system in recent 20 years;we summaries the principle of long-range BOTDR optical fiber sensing system based on technologies of data processing,pulse coding,multi-wavelength detection,high extinction ratio modulation,Raman,narrow linewidth light source and single-photon detection.Further improve the system signal-to-noise ratio,spatial resolution,sensing distance,shorten the measurement time of the whole system,optimize multiple performance parameters;and further increase the sensing parameters excepting temperature/strain,enhance the system function;as well as further addressing temperature/strain cross-sensitivity issues;all will become the future development direction of long-distance BOTDR optical fiber sensing system.

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黄强,孙军强,包宇奔,刘新波.长距离布里渊光时域反射光纤传感技术进展[J].激光与红外,2021,51(4):395~403
HUANG Qiang, SUN Jun-qiang, BAO Yu-ben, LIU Xin-bo. Advances of technologies in long-range Brillouin optical time-domain reflective optical fiber sensing[J]. LASER & INFRARED,2021,51(4):395~403

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  • 在线发布日期: 2021-05-11