Temperature and Acoustic Impedance Simultaneous Sensing Based on FBS in Coated Optical Fiber

被引：3

作者：

Liang, Lulu ^{[1
,2
]}

Zhang, Zelin ^{[3
,4
]}

Zhang, Wujun ^{[1
,2
]}

Peng, Jianqin ^{[1
,2
]}

Li, Xinghan ^{[1
,2
]}

Lu, Yuangang ^{[1
,2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Astronaut, Key Lab Space Photoelect Detect & Percept, Minist Ind & Informat Technol, Nanjing 211106, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211106, Peoples R China

[3] Zhongtian Technol Adv Mat Co Ltd, Zhongtian Technol Grp, Nantong 216000, Peoples R China

[4] Fudan Univ, Sch Informat Sci & Technol, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2023年 / 35卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Forward Brillouin scattering; optical fiber; temperature measurement; acoustic impedance measurement; BRILLOUIN-SCATTERING; DISCRIMINATION; SENSOR; STRAIN;

D O I：

10.1109/LPT.2023.3298717

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel method for simultaneous measurement of temperature and acoustic impedance based on forward Brillouin scattering (FBS) in a thin polyimide-coated G657 single-mode optical fiber is proposed. By measuring the changes of frequency shift and linewidth of the FBS spectrum corresponding to a certain transverse acoustic mode, temperature and acoustic impedance sensing can be realized with high sensitivity, high mechanical strength and relatively high accuracy. The linewidthtemperature, frequency shift-acoustic impedance and linewidthacoustic impedance coefficients of the polyimide-coated fiber are 19.5, 5.5 and 5.9 times of those of the bare LEAF, respectively. In a proof-of-concept experiment, the thin polyimide-coated G657 is used as the sensing fiber, and the temperature and acoustic impedance measurement errors are 0.17(circle)C and 0.007 MRayl, respectively. The proposed FBS based sensor is expected to become a simple, accurate fiber sensor with potential advantages of durable and stable for simultaneously measuring temperature and acoustic impedance, which has great potential in many practical applications.

引用

页码：1151 / 1154

页数：4

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