Laser & Optoelectronics Progress, Volume. 58, Issue 13, 1306021(2021)
Research Progress on Temperature-Strain Dual-Parameter Sensing in BOTDA System
Distributed optical fiber sensing based on Brillouin optical time-domain analysis (BOTDA) allows the simultaneous measurement of parameters such as temperature and strain. In addition, it provides an ultralong sensing distance, high spatial resolution, and high precision, and is widely used in structural health monitoring in areas such as infrastructure and aerospace engineering. However, the BOTDA sensing system exhibits cross-sensitivity between temperature and strain, hindering the discrimination of the influencing factors during measurement and severely restricting the sensing and monitoring capabilities. To address these problems, this article introduces, analyzes, and compares seven methods based on reference fiber, grating assistance, multiparameter assistance, special fiber, dual-wavelength sensing, Raman/Rayleigh scattering assistance, and neural networks to provide a reference for research and application of cross-sensitivity in optical fiber sensing.
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Jingyang Liu, Tao Wang, Qian Zhang, Jieru Zhao, Mingjiang Zhang, Jianzhong Zhang, Lijun Qiao, Shaohua Gao. Research Progress on Temperature-Strain Dual-Parameter Sensing in BOTDA System[J]. Laser & Optoelectronics Progress, 2021, 58(13): 1306021
Category: Fiber Optics and Optical Communications
Received: Sep. 7, 2020
Accepted: Nov. 5, 2020
Published Online: Jul. 5, 2021
The Author Email: Zhang Mingjiang (zhangmingjiang@tyut.edu.cn)