Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber

doi:10.1088/1674-1056/adca1b

中国物理B ›› 2025, Vol. 34 ›› Issue (7): 74212-074212.doi: 10.1088/1674-1056/adca1b

Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber

Shilong Liu(刘仕龙), Yang Li(李阳), Hongbin Hu(胡洪彬), Bing Sun(孙兵), and Zuxing Zhang(张祖兴)†

Advanced Photonic Technology Laboratory, the College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

收稿日期:2025-02-24 修回日期:2025-03-28 接受日期:2025-04-08 出版日期:2025-06-18 发布日期:2025-06-30
通讯作者: Zuxing Zhang E-mail:zxzhang@njupt.edu.cn

Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber

Shilong Liu(刘仕龙), Yang Li(李阳), Hongbin Hu(胡洪彬), Bing Sun(孙兵), and Zuxing Zhang(张祖兴)†

Advanced Photonic Technology Laboratory, the College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

Received:2025-02-24 Revised:2025-03-28 Accepted:2025-04-08 Online:2025-06-18 Published:2025-06-30
Contact: Zuxing Zhang E-mail:zxzhang@njupt.edu.cn

摘要/Abstract

摘要： A temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering (FSBS) in highly nonlinear fiber (HNLF) with high sensitivity and high accuracy is proposed and demonstrated in this paper. High-order acoustic modes (HOAMs) are used to achieve individual or simultaneous measurement of the two parameters. Transverse acoustic waves (TAWs) involved in the FSBS process can efficiently sense the mechanical or environmental changes outside the fiber cladding, which will be reflected in a linear shift of the acoustic resonance frequency. By analyzing the frequencies of specific scattering peaks, the temperature and acoustic impedance outside the fiber cladding can be obtained simultaneously. The highest measured temperature and acoustic impedance sensitivities are 184.93 kHz/$^\circ$C and 444.56 kHz/MRayl, and the measurement accuracies are 0.09 $^\circ$C and 0.009 MRayl, respectively, which are both at desirable levels. We believe this work can provide potential application solutions for sensing fields involving temperature or acoustic impedance measurements.

关键词: forward stimulated Brillouin scattering (FSBS), fiber optic sensor, temperature sensor, acoustic impedance sensor, simultaneous measurement

Abstract: A temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering (FSBS) in highly nonlinear fiber (HNLF) with high sensitivity and high accuracy is proposed and demonstrated in this paper. High-order acoustic modes (HOAMs) are used to achieve individual or simultaneous measurement of the two parameters. Transverse acoustic waves (TAWs) involved in the FSBS process can efficiently sense the mechanical or environmental changes outside the fiber cladding, which will be reflected in a linear shift of the acoustic resonance frequency. By analyzing the frequencies of specific scattering peaks, the temperature and acoustic impedance outside the fiber cladding can be obtained simultaneously. The highest measured temperature and acoustic impedance sensitivities are 184.93 kHz/$^\circ$C and 444.56 kHz/MRayl, and the measurement accuracies are 0.09 $^\circ$C and 0.009 MRayl, respectively, which are both at desirable levels. We believe this work can provide potential application solutions for sensing fields involving temperature or acoustic impedance measurements.

Key words: forward stimulated Brillouin scattering (FSBS), fiber optic sensor, temperature sensor, acoustic impedance sensor, simultaneous measurement

中图分类号: (Sensors, gyros)

42.81.Pa

42.81.-i (Fiber optics) 07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

Shilong Liu(刘仕龙), Yang Li(李阳), Hongbin Hu(胡洪彬), Bing Sun(孙兵), and Zuxing Zhang(张祖兴). Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber[J]. 中国物理B, 2025, 34(7): 74212-074212.

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Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber

Temperature and acoustic impedance simultaneous sensor based on forward stimulated Brillouin scattering in highly nonlinear fiber

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