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Proceedings Paper

Bragg-grating-based Fabry-Perot sensor system for acoustic measurements
Author(s): Christopher S. Baldwin; Miao Yu; Craig E. Miller; James S. Sirkis; Steve Chen; Balakumar Balachandran
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Paper Abstract

We report recent work on acoustic measurements using a Bragg grating based Fabry-Perot sensor system. A single Fabry-Perot sensor using a path matched Michelson interferometer was developed, and a digital demodulation scheme based on the phase stepping technique was used to measure acoustic sound pressure from 100 Hz to 600 Hz. This sensor is designed to work in a multiplexed architecture to provide inputs to a feed-forward adaptive control system. This control system will be used to actively control the sound pressure level within an enclosure. A series of experiments were performed to investigate the possibility and potential use of this sensor system for acoustic noise detection. In this paper, we present initial test data from the prototype optical sensor microphone. We also illustrate the envisioned multiplexed sensor scheme and control system.

Paper Details

Date Published: 31 May 1999
PDF: 10 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349745
Show Author Affiliations
Christopher S. Baldwin, Univ. of Maryland/College Park (United States)
Miao Yu, Univ. of Maryland/College Park (United States)
Craig E. Miller, Univ. of Maryland/College Park (United States)
James S. Sirkis, Univ. of Maryland/College Park (United States)
Steve Chen, Univ. of Maryland/College Park (United States)
Balakumar Balachandran, Univ. of Maryland/College Park (United States)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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