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Proceedings Paper

Multipoint detection of an acoustic wave in water with a WDM fiber-Bragg-grating sensor
Author(s): Nobuaki Takahashi; Kanta Tetsumura; Sumio Takahashi
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Paper Abstract

Using two fiber Bragg gratings (FBG) in serial connection and WDM technique, multipoint detection of an acoustic field in water is demonstrated after having measured the spatial resolving power of an FBG underwater acoustic sensor. An acoustic sensor with a 24 mm ling FBG is found to have the spatial resolution on the order of 1 mm. Two FBGs in the WDM sensor work independently without interfering each other and the sensor provides us with real-time detection of the amplitudes and phases of the acoustic field at different points in water.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347815
Show Author Affiliations
Nobuaki Takahashi, National Defense Academy (Japan)
Kanta Tetsumura, National Defense Academy (Japan)
Sumio Takahashi, National Defense Academy (Japan)


Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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