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Proceedings Paper

Optimization of a fiber optic flexible disk microphone
Author(s): Gang Zhang; Benli Yu; Hui Wang; Fei Liu; Xuqiang Wu
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Paper Abstract

An optimized design of a fiber optic flexible disk microphone is presented and verified experimentally. The phase sensitivity of optical fiber microphone (both the ideal model with a simply supported disk (SSD) and the model with a clamped disk (CLD)) is analyzed by utilizing theory of plates and shells. The results show that the microphones have an optimum length of the sensing arm when inner radius of the fiber coils, radius and Poisson's radio of the flexible disk have been determined. Under a typical condition depicted in this paper, an optimum phase sensitivity for SSD model of 27.72 rad/Pa (-91.14 dB re 1 rad/μPa) and an optimum phase sensitivity for CLD model of 3.18 rad/Pa (-109.95 dB re 1 rad/μPa), can be achieved in theory. Several sample microphones are fabricated and tested. The experimental results are basically consistent with the theoretical analysis.

Paper Details

Date Published: 22 November 2011
PDF: 8 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81990J (22 November 2011); doi: 10.1117/12.904823
Show Author Affiliations
Gang Zhang, Anhui Univ. (China)
Benli Yu, Anhui Univ. (China)
Hui Wang, Anhui Univ. (China)
Fei Liu, Anhui Univ. (China)
Xuqiang Wu, Anhui Univ. (China)


Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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