光时域反射计
光学
布里渊散射
分布式声传感
瑞利散射
反射计
光纤传感器
时域
航程(航空)
分辨率(逻辑)
散射
单模光纤
动态范围
材料科学
前向散射
布里渊区
图像分辨率
物理
保偏光纤
光纤
计算机科学
复合材料
人工智能
计算机视觉
作者
Yong Kang Dong,Dexin Ba,Liqiang Qiu,Q. Chu,Yulin Pei,Dianyang Lin
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-11-02
卷期号:47 (22): 5777-5777
被引量:2
摘要
A wide-dynamic-range and high-resolution optical fiber sensor based on Brillouin and Rayleigh scattering is proposed, which merges frequency-scanning phase-sensitive optical time-domain reflectometry (Φ-OTDR) and Brillouin optical time domain analysis (BOTDA) via an adaptive signal corrector (ASC). The ASC suppresses the accumulated error of Φ-OTDR with the reference of BOTDA, which breaks through the measurement range limitation of Φ-OTDR so that the proposed sensor can perform a high-resolution measurement in a wide dynamic range. Its measurement range is determined by BOTDA, and can reach the limitation of optical fiber, while the resolution is limited by Φ-OTDR. In proof-of-concept experiments, a maximum strain variation of up to 302.9 µɛ is measured with a resolution of 5.5 nɛ. Furthermore, with an ordinary single-mode fiber, high-resolution dynamic pressure monitoring in the range from 20 MP to 0.29 MPa is also demonstrated with 0.14-kPa resolution. This research represents the first time, to the best of our knowledge, that a solution for merging data from a Brillouin sensor and a Rayleigh sensor which achieves the advantages of the two sensors at the same time has been realized.
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