Bragg-grating-based Fabry-Perot sensor system for acoustic measurements

Christopher S. Baldwin; Miao Yu; Craig E. Miller; James S. Sirkis; Steve Chen; Balakumar Balachandran

doi:10.1117/12.349745

31 May 1999 Bragg-grating-based Fabry-Perot sensor system for acoustic measurements

Christopher S. Baldwin, Miao Yu, Craig E. Miller, James S. Sirkis, Steve Chen, Balakumar Balachandran

Proceedings Volume 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (1999) https://doi.org/10.1117/12.349745
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

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.

Citation Download Citation

Christopher S. Baldwin, Miao Yu, Craig E. Miller, James S. Sirkis, Steve Chen, and Balakumar Balachandran "Bragg-grating-based Fabry-Perot sensor system for acoustic measurements", Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); https://doi.org/10.1117/12.349745

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