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Proceedings Paper

An FBG microphone array system with signal demodulator using AWG
Author(s): Kentaro Nakamura; Takuma Fujisue; Sadayuki Ueha
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Paper Abstract

An AWG-based interrogator is tested for FBG microphone array. Element microphones composed of FBG bonded on membrane are connected in series in one fiber cable and illuminated by a wideband source. The reflected light is processed with the system consist of a 32-ch AWG, photo diodes and differential amplifiers. First, the sensitivity and the frequency responses of the FBG microphone unit are studied mainly through experiments. Then, the operation point is discussed for the interrogation using AWG. The demonstrations of two-element and four-element arrays are carried out for audible sound waves.

Paper Details

Date Published: 12 October 2007
PDF: 8 pages
Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 677006 (12 October 2007); doi: 10.1117/12.734331
Show Author Affiliations
Kentaro Nakamura, Tokyo Institute of Technology (Japan)
Takuma Fujisue, Tokyo Institute of Technology (Japan)
Sadayuki Ueha, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6770:
Fiber Optic Sensors and Applications V
Eric Udd, Editor(s)

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