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Proceedings Paper

Development of small-diameter optical fiber sensors for damage detection in composite laminates
Author(s): Kouji Satori; Yukio Ikeda; Yoshinori Kurosawa; Akihito Hongo; Nobuo Takeda
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Paper Abstract

Optical fiber sensor systems have been recently used for ,health monitoring of fiber reinforced plastic (FRP) composite laminate structures. However, the diameter of optical fibers for optical communication is normally 125 μm, which is similar to the thickness of one ply in FRP composite laminates. In order to embed optical fibers within one ply of FRP without introducing any defects in laminates, small- diameter optical fibers are necessary. The present paper describes development of small-diameter optical fiber sensors for damage detection in composite laminates. The coating diameter of the prototype small-diameter optical fiber is 52 μm, while the diameters of the cladding and the core are 40 μm and 8.5 μm, respectively. FBG (Fiber Bragg Grating) sensors were also fabricated with these fibers. Gratings were inscribed into the optical fiber by ultra-violet irradiation method. The wavelength shift and the response by strain of FBG itself were measured. The strain response, when small-diameter optical fiber and FBG sensors were embedded in composite laminates, were evaluated for practical application to detect the damage evolution.

Paper Details

Date Published: 12 June 2000
PDF: 8 pages
Proc. SPIE 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (12 June 2000); doi: 10.1117/12.388097
Show Author Affiliations
Kouji Satori, Hitachi Cable, Ltd. (Japan)
Yukio Ikeda, Hitachi Cable, Ltd. (Japan)
Yoshinori Kurosawa, Hitachi Cable, Ltd. (Japan)
Akihito Hongo, Hitachi Cable, Ltd. (Japan)
Nobuo Takeda, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 3986:
Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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