中国物理B ›› 2021, Vol. 30 ›› Issue (8): 84205-084205.doi: 10.1088/1674-1056/abfcce

• • 上一篇    下一篇

Distributed analysis of forward stimulated Brillouin scattering for acoustic impedance sensing by extraction of a 2nd-order local spectrum

Yu-Lian Yang(杨玉莲), Jia-Bing Lin(林佳兵), Li-Ming Liu(刘黎明), Xin-Hong Jia(贾新鸿), Wen-Yan Liang(梁文燕), Shi-Rong Xu(许世蓉), and Li Jiang(姜利)   

  1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
  • 收稿日期:2021-03-08 修回日期:2021-04-22 接受日期:2021-04-29 出版日期:2021-07-16 发布日期:2021-07-20
  • 通讯作者: Xin-Hong Jia E-mail:jiaxh_0@126.com
  • 基金资助:
    Project supported by the Sichuan Science and Technology Program (Grant No. 2019YJ0530), Scientific Research Fund of Sichuan Provincial Education Department, China (Grant No. 18ZA0401), and the National Natural Science Foundation of China (Grant No. 61205079).

Distributed analysis of forward stimulated Brillouin scattering for acoustic impedance sensing by extraction of a 2nd-order local spectrum

Yu-Lian Yang(杨玉莲), Jia-Bing Lin(林佳兵), Li-Ming Liu(刘黎明), Xin-Hong Jia(贾新鸿), Wen-Yan Liang(梁文燕), Shi-Rong Xu(许世蓉), and Li Jiang(姜利)   

  1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
  • Received:2021-03-08 Revised:2021-04-22 Accepted:2021-04-29 Online:2021-07-16 Published:2021-07-20
  • Contact: Xin-Hong Jia E-mail:jiaxh_0@126.com
  • Supported by:
    Project supported by the Sichuan Science and Technology Program (Grant No. 2019YJ0530), Scientific Research Fund of Sichuan Provincial Education Department, China (Grant No. 18ZA0401), and the National Natural Science Foundation of China (Grant No. 61205079).

摘要: Distributed fiber sensors based on forward stimulated Brillouin scattering (F-SBS) have attracted special attention because of their capability to detect the acoustic impedance of liquid material outside fiber. However, the reported results were based on the extraction of a 1st-order local spectrum, causing the sensing distance to be restricted by pump depletion. Here, a novel post-processing technique was proposed for distributed acoustic impedance sensing by extracting the 2nd-order local spectrum, which is beneficial for improving the sensing signal-to-noise ratio (SNR) significantly, since its pulse energy penetrates into the fiber more deeply. As a proof-of-concept, distributed acoustic impedance sensing along ~1630 m fiber under moderate spatial resolution of ~20 m was demonstrated.

关键词: distributed acoustic impedance sensing, forward stimulated Brillouin scattering (F-SBS), 2nd-order local spectrum

Abstract: Distributed fiber sensors based on forward stimulated Brillouin scattering (F-SBS) have attracted special attention because of their capability to detect the acoustic impedance of liquid material outside fiber. However, the reported results were based on the extraction of a 1st-order local spectrum, causing the sensing distance to be restricted by pump depletion. Here, a novel post-processing technique was proposed for distributed acoustic impedance sensing by extracting the 2nd-order local spectrum, which is beneficial for improving the sensing signal-to-noise ratio (SNR) significantly, since its pulse energy penetrates into the fiber more deeply. As a proof-of-concept, distributed acoustic impedance sensing along ~1630 m fiber under moderate spatial resolution of ~20 m was demonstrated.

Key words: distributed acoustic impedance sensing, forward stimulated Brillouin scattering (F-SBS), 2nd-order local spectrum

中图分类号:  (Fiber optics)

  • 42.81.-i
42.81.Pa (Sensors, gyros) 78.35.+c (Brillouin and Rayleigh scattering; other light scattering)