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Proceedings Paper

Displacement sensing with hetero-core fiber specklegram
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Paper Abstract

In this paper we report the design and implementation of a multimode fiber sensing technique for displacement sensing. To exploit the spatial information contents for sensing, a multimode fiber specklegram sensor with a hetero-core fiber structure is used. The sensor utilizes the inner product of multimode fiber speckle fields, which is highly sensitive on the geometrical shape change of the sensing section. The sensitivity and the dynamic range of the displacement sensing are investigated for hetero-core structure fiber specklegram sensor and straight multimode fiber specklegram sensor. It’s found that the sensitivity of the hetero-core FSS offers sensitivity as high as 0.1 μm, with a dynamic range of about 3 μm, which is superior to straight structure multimode fiber FSS. Dynamic response of the hetero-core FSS for displacement sensing was also studied.

Paper Details

Date Published: 22 October 2004
PDF: 9 pages
Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); doi: 10.1117/12.560515
Show Author Affiliations
Bo Wang, The Pennsylvania State Univ. (United States)
John Youwei Fu, The Pennsylvania State Univ. (United States)
Yuexin Liu, The Pennsylvania State Univ. (United States)
Ruyan Guo, The Pennsylvania State Univ. (United States)
Francis T. S. Yu, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 5560:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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