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Optical Engineering

Diaphragm-type fiber-optic interferometric acoustic sensor
Author(s): Nan Zeng; Chunzheng Shi; Dongning Wang; Min Zhang; Yanbiao Liao
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Paper Abstract

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 –139 dB re V/μPa and 82 dB re μPa, respectively.

Paper Details

Date Published: 1 September 2003
PDF: 5 pages
Opt. Eng. 42(9) doi: 10.1117/1.1596433
Published in: Optical Engineering Volume 42, Issue 9
Show Author Affiliations
Nan Zeng, Tsinghua Univ. (China)
Chunzheng Shi, Tsinghua Univ. (China)
Dongning Wang, Hong Kong Polytechnic Univ. (Hong Kong)
Min Zhang, Tsinghua Univ. (China)
Yanbiao Liao, Tsinghua Univ. (China)

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