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Article

Research on Multi-Core Curvature Sensing Measurement Based on PPP-BOTDA

by
Zijuan Liu
1,*,
Yongqian Li
1,2,
Lixin Zhang
1,2 and
Lei Wang
3
1
Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China
2
Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, China
3
School of Energy Storage Science and Engineering, North China University of Technology, Beijing 100144, China
*
Author to whom correspondence should be addressed.
Sensors 2024, 24(18), 6023; https://doi.org/10.3390/s24186023
Submission received: 8 August 2024 / Revised: 12 September 2024 / Accepted: 12 September 2024 / Published: 18 September 2024
(This article belongs to the Section Physical Sensors)
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Abstract

To address the issue of spatial resolution limitations in traditional Brillouin optical time-domain analysis systems due to phonon lifetime constraints, we employed pre-pumped pulse technology. Additionally, to mitigate the double-peak phenomenon observed in pre-pumped Brillouin optical time-domain analysis systems, we implemented a two-sided band interference method to reduce the linewidth of the double-peak fitting. We conducted bending measurements on three eccentric cores and intermediate cores spaced 120° apart. Our results demonstrate that the system described in this paper can achieve a spatial resolution of 30 cm, with bimodal linewidths of 23.1 MHz and 16.0 MHz. Using the parallel transmission frame algorithm, we determined the curvature of a seven-core fiber with a curvature diameter of approximately 10 cm to be 20.67 m−1, with an error margin of 3.2%.
Keywords: pre-pumped; double peak; two-sided band interference; bending measurements; curvature pre-pumped; double peak; two-sided band interference; bending measurements; curvature

Share and Cite

MDPI and ACS Style

Liu, Z.; Li, Y.; Zhang, L.; Wang, L. Research on Multi-Core Curvature Sensing Measurement Based on PPP-BOTDA. Sensors 2024, 24, 6023. https://doi.org/10.3390/s24186023

AMA Style

Liu Z, Li Y, Zhang L, Wang L. Research on Multi-Core Curvature Sensing Measurement Based on PPP-BOTDA. Sensors. 2024; 24(18):6023. https://doi.org/10.3390/s24186023

Chicago/Turabian Style

Liu, Zijuan, Yongqian Li, Lixin Zhang, and Lei Wang. 2024. "Research on Multi-Core Curvature Sensing Measurement Based on PPP-BOTDA" Sensors 24, no. 18: 6023. https://doi.org/10.3390/s24186023

APA Style

Liu, Z., Li, Y., Zhang, L., & Wang, L. (2024). Research on Multi-Core Curvature Sensing Measurement Based on PPP-BOTDA. Sensors, 24(18), 6023. https://doi.org/10.3390/s24186023

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