Broadband Fiber-Optic Acoustic Sensors

被引：9

作者：

Wei, Heming ^{[1
]}

Gong, Zhe ^{[1
]}

Wu, Wenjing ^{[2
]}

Che, Jiawei ^{[1
]}

Zhang, Liang ^{[1
]}

Pang, Fufei ^{[1
]}

Wang, Tingyun ^{[1
]}

机构：

[1] Shanghai Univ, Sch Commun & Informat Engn, Key Lab Specialty Fiber Opt & Opt Access Networks, Shanghai 200444, Peoples R China

[2] Jiangsu Univ Sci & Technol, Sch Architecture & Civil Engn, Zhenjiang 212000, Jiangsu, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2022年 / 40卷 / 12期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Optical fiber sensors; Sensors; Ring lasers; Optical interferometry; Optical fiber couplers; Erbium-doped fiber lasers; Fiber gratings; Acoustic sensor; fiber Bragg grating; fiber optic sensor; fiber ring laser; unbalanced Mach-Zehnder interferometer; ULTRASOUND DETECTION; RING LASERS; STRAIN; EMISSION; SIGNALS; DEMODULATION; SYSTEM; CAVITY; ARRAY;

D O I：

10.1109/JLT.2022.3154724

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 broadband fiber-optic acoustic sensing system is proposed and demonstrated, which is configured by a fiber Bragg grating (FBG) and an erbium-doped fiber (EDF) ring laser. As the acoustic waves can shift the FBG reflective spectrum, the wavelength of the laser output shifts accordingly and this shift is subsequently converted into a corresponding phase shift and demodulated by an unbalanced fiber-optic Mach-Zehnder interferometer (MZI). The sensitivity of the presented sensing system is also investigated, which is a function of the optical path difference of the MZI and the linewidth of the FBG. Due to the adaptability and high sensitivity of the system, it can detect signals with frequencies from tens of hertz to hundreds of kilohertz, which shows the potential for acoustic emission detection in real applications.

引用

页码：4033 / 4041

页数：9

共 50 条

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