Displacement sensing with hetero-core fiber specklegram

Bo Wang; John Youwei Fu; Yuexin Liu; Ruyan Guo; Francis T. S. Yu

doi:10.1117/12.560515

22 October 2004 Displacement sensing with hetero-core fiber specklegram

Bo Wang, John Youwei Fu, Yuexin Liu, Ruyan Guo, Francis T. S. Yu

Proceedings Volume 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X; (2004) https://doi.org/10.1117/12.560515
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Bo Wang, John Youwei Fu, Yuexin Liu, Ruyan Guo, and Francis T. S. Yu "Displacement sensing with hetero-core fiber specklegram", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); https://doi.org/10.1117/12.560515

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