• Optoelectronics Letters
  • Vol. 20, Issue 1, 7 (2024)
Yongqian LI1、2、3, Zijuan LIU1、2、3、*, Lixin ZHANG1、2、3, Min TIAN1、2、3, and Haijun and FAN1、2、3
Author Affiliations
  • 1Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China
  • 2Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, China
  • 3Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology, North China Electric Power University, Baoding 071003, China
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    DOI: 10.1007/s11801-024-3084-7 Cite this Article
    LI Yongqian, LIU Zijuan, ZHANG Lixin, TIAN Min, and 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 Copy Citation Text show less

    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 tem-perature and bending performance. Two-mode and four-mode step FMFs were combined to splice the few-mode seg-ment. 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.
    LI Yongqian, LIU Zijuan, ZHANG Lixin, TIAN Min, and 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
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