Home > Archive>Volume 20, Issue 1, 2024 >7-11. DOI:https://doi.org/10.1007/s11801-024-3084-7
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Research and analysis of Brillouin distributed sensing system based on quasi-single-mode few-mode fiber
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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. Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology, North China Electric Power University, Baoding 071003, China

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    Abstract:

    A distributed fiber sensor was fabricated by splicing two single-mode fibers (SMFs) using the few-mode fiber (FMF) technique. A Brillouin optical time domain analysis (BOTDA) system was developed to measure the sensor's temperature and bending performance. Two-mode and four-mode step FMFs were combined to splice the few-mode segment. The results indicate that the temperature response coefficients of the few-mode segment are only slightly higher than those of the connected single-mode segment, measuring at 1.13 MHz/°C and 1.12 MHz/°C, respectively. The minimum bending radius for the sensor is 0.9 cm, and the four-mode bending response curve is superior to that of the two-mode one, proving that 4-SI-FMF offers better bending sensitivity.

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LI Yongqian, LIU Zijuan, ZHANG Lixin, TIAN Min, FAN Haijun. Research and analysis of Brillouin distributed sensing system based on quasi-single-mode few-mode fiber[J]. Optoelectronics Letters,2024,20(1):7-11

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History
  • Received:May 11,2023
  • Revised:July 05,2023
  • Online: December 25,2023
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