Diaphragm-type fiber-optic interferometric acoustic sensor

A diaphragm-type fiber-optic acoustic sensor is developed. In such a sensor, the sound-induced strain is imposed on the fiber on the diaphragm-type sensing element, and can be measured by the use of a Mach-Zehnder interferometer. The diaphragm structure can provide directional response with high sen...

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Bibliographic Details
Published in:Optical Engineering 2003-09, Vol.42 (9), p.2558-2562
Main Authors: Zeng, Nan, Shi, Chunzheng, Wang, Dongning, Zhang, Min, Liao, Yanbiao
Format: Article
Language:English
Subjects:
acoustic sensor
fiber optic sensors
interferometric sensors
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Summary:A diaphragm-type fiber-optic acoustic sensor is developed. In such a sensor, the sound-induced strain is imposed on the fiber on the diaphragm-type sensing element, and can be measured by the use of a Mach-Zehnder interferometer. The diaphragm structure can provide directional response with high sensitivity. The experimental measurement frequency range is from 100 Hz to 5 kHz. The sensitivity and minimum detectable acoustic pressure of the system are and 82 dB re Pa, respectively. ©
ISSN:0091-3286
1560-2303
DOI:10.1117/1.1596433