Fiber-Optic Michelson Interferometric Acoustic Sensor Based on a PP/PET Diaphragm

被引：100

作者：

Liu, Li ^{[1
]}

Lu, Ping ^{[1
]}

Liao, Hao ^{[1
]}

Wang, Shun ^{[1
]}

Yang, Wei ^{[1
]}

Liu, Deming ^{[1
]}

Zhang, Jiangshan ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Natl Engn Lab Next Generat Internet Access Syst, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Dept Elect & Informat Engn, Wuhan 430074, Peoples R China

来源：

IEEE SENSORS JOURNAL | 2016年 / 16卷 / 09期

关键词：

Acoustic sensor; Michelson interferometer; PP/PET diaphragm; low-frequency;

D O I：

10.1109/JSEN.2016.2526644

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 acoustic sensor based on a polypropylene/poly (ethylene terephthalate) (PP/PET) diaphragm is demonstrated. The Michelson interferometer is formed by two beams of light that are reflected into optical fiber collimators by both sides of the PP/PET film. The deformation of diaphragm caused by acoustic signal will be magnified twice in the optical path of proposed sensor. The sensitivity of our proposed sensor is more than -128 dB re 1 rad/mu Pa in the frequency range of 90-4000 Hz, and a signal-to-noise ratio of similar to 42 dB is achieved at 600 Hz. Due to its superiorities of low cost, small size, high sensitivity, and easy fabrication, the proposed sensor exhibits a potential for low-frequency acoustic sensing and healthy monitoring.

引用

页码：3054 / 3058

页数：5

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