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Proceedings Paper

A novel and small curvature sensor based on butterfly-shape Mach-Zehnder interferometer
Author(s): Mao-qing Chen; Yong Zhao; Ri-qing Lv; Feng Xia
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Paper Abstract

A novel hollow-core fiber (HCF) curvature sensor based on a tapered HCF sandwiched between two single mode fibers (Butterfly-Shape Structure) is proposed and experimentally demonstrated. The collapsed region around the first fusion interface excites the high-order modes, and the butterfly shape couples the high-order modes back into the core and interferes with the fundamental mode in the second fusion interface. Simulation of the butterfly-shape structure is carried out using the beam propagation method to determine an optimized size of sensing element. The experimental results show that the variation of the interference spectrum light intensity is almost linearly proportional to the change of curvature, and the curvature sensitivity and resolution of the proposed sensor can be up to −10.9041dB / m−1 and 0.000917m−1 respectively in the range from 0.387 to 1.285 m−1. The proposed curvature sensor is compact size, high sensitive, and inexpensive.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103231W (23 April 2017); doi: 10.1117/12.2262331
Show Author Affiliations
Mao-qing Chen, Northeastern Univ. (China)
Yong Zhao, Northeastern Univ. (China)
Ri-qing Lv, Northeastern Univ. (China)
Feng Xia, Northeastern Univ. (China)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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