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17 August 2023 Distributed optical fiber strain sensing under ultra-low temperature based on Rayleigh backscattering
Yantao Liu, Changle Ru, Hongbo Wang, Chuncheng Xiao, Zhigang Wang
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Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 127572Q (2023) https://doi.org/10.1117/12.2690250
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China
Abstract
A distributed optical fiber strain sensing under ultra-low temperature based on Rayleigh Backscattering light was realized in this paper. An auto correlation demodulation technique was used to improve the measurement accuracy. The optical fiber’s displacement caused by ultra-low temperature environment was corrected during the auto correlation operation. A temperature compensation Technology based on Fiber Bragg Grating Sensing was proposed, which could effectively compensate the impact of thermal expansion of the structure on the distributed optical fiber. The technique can adapt to the measuring environment with large temperature changes, and significantly improve the accuracy of strain measurement.
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Yantao Liu, Changle Ru, Hongbo Wang, Chuncheng Xiao, and Zhigang Wang "Distributed optical fiber strain sensing under ultra-low temperature based on Rayleigh backscattering", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 127572Q (17 August 2023); https://doi.org/10.1117/12.2690250
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KEYWORDS
Optical fibers
Temperature metrology
Rayleigh scattering
Sensing systems
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