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超长距离混合布里渊光时域反射计/频域光时域反射计

Ultra-Long-Distance Hybrid BOTDA/Ф-OTDR.

作者信息

Fu Yun, Wang Zinan, Zhu Richeng, Xue Naitian, Jiang Jialin, Lu Chongyu, Zhang Bin, Yang Le, Atubga David, Rao Yunjiang

机构信息

Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education), University of Electronic Science and Technology of China (UESTC), Chengdu 611731, China.

Center for Information Geoscience, UESTC, Chengdu 611731, China.

出版信息

Sensors (Basel). 2018 Mar 25;18(4):976. doi: 10.3390/s18040976.

DOI:10.3390/s18040976
PMID:29587407
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5948708/
Abstract

In the distributed optical fiber sensing (DOFS) domain, simultaneous measurement of vibration and temperature/strain based on Rayleigh scattering and Brillouin scattering in fiber could have wide applications. However, there are certain challenges for the case of ultra-long sensing range, including the interplay of different scattering mechanisms, the interaction of two types of sensing signals, and the competition of pump power. In this paper, a hybrid DOFS system, which can simultaneously measure temperature/strain and vibration over 150 km, is elaborately designed via integrating the Brillouin optical time-domain analyzer (BOTDA) and phase-sensitive optical time-domain reflectometry (Ф-OTDR). Distributed Raman and Brillouin amplifications, frequency division multiplexing (FDM), wavelength division multiplexing (WDM), and time division multiplexing (TDM) are delicately fused to accommodate ultra-long-distance BOTDA and Ф-OTDR. Consequently, the sensing range of the hybrid system is 150.62 km, and the spatial resolution of BOTDA and Ф-OTDR are 9 m and 30 m, respectively. The measurement uncertainty of the BOTDA is ± 0.82 MHz. To the best of our knowledge, this is the first time that such hybrid DOFS is realized with a hundred-kilometer length scale.

摘要

在分布式光纤传感（DOFS）领域，基于光纤中的瑞利散射和布里渊散射同时测量振动和温度/应变具有广泛的应用前景。然而，对于超长传感范围的情况存在一定挑战，包括不同散射机制的相互作用、两种传感信号的相互影响以及泵浦功率的竞争。本文通过集成布里渊光时域分析仪（BOTDA）和相敏光时域反射仪（Ф-OTDR），精心设计了一种能够同时测量150公里以上温度/应变和振动的混合DOFS系统。分布式拉曼和布里渊放大、频分复用（FDM）、波分复用（WDM）和时分复用（TDM）被巧妙融合，以适应超长距离的BOTDA和Ф-OTDR。因此，混合系统的传感范围为150.62公里，BOTDA和Ф-OTDR的空间分辨率分别为9米和30米。BOTDA的测量不确定度为±0.82兆赫兹。据我们所知，这是首次在百公里长度尺度上实现这种混合DOFS。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/890deaaa59c1/sensors-18-00976-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/5d40d711843b/sensors-18-00976-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/890deaaa59c1/sensors-18-00976-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/0247d96eb43a/sensors-18-00976-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/5eebb8214209/sensors-18-00976-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/d62710d54d25/sensors-18-00976-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/055a863b0d74/sensors-18-00976-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/ea1556f043e9/sensors-18-00976-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/3fbe1954a0ad/sensors-18-00976-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/ed9d1f47327d/sensors-18-00976-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/5d40d711843b/sensors-18-00976-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/779d/5948708/890deaaa59c1/sensors-18-00976-g009.jpg

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