Refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber

Xinghu Fu; Haiyang Xie; Guangwei Fu; Qiang Liu; Weihong Bi

doi:10.1117/12.2199784

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8 October 2015 Refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber

Xinghu Fu; Haiyang Xie; Guangwei Fu; Qiang Liu; Weihong Bi

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Proceedings Volume 9679, AOPC 2015: Optical Fiber Sensors and Applications; 96790U (2015) https://doi.org/10.1117/12.2199784
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

A refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber (STCF) is proposed. The corresponding mode properties of STCF are investigated theoretically based on the coupled mode theory. The different mode dispersion curves are calculated and a resonance wavelength is obtained. A straightforward experiment is performed to prove the curvature sensitivity. Experimental results shows that the curvature sensitivity can be achieve -11.03374nm/m^-1 in the range of 0~1.17m^-1, and it also has good linearity. This curvature sensor has the advantages of simple structure, easy manufacturing, highly sensitivity and has no cross-sensitivity when it compared to the other sensors. Thus it can be used for curvature monitoring in time.

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Xinghu Fu, Haiyang Xie, Guangwei Fu, Qiang Liu, and Weihong Bi "Refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber", Proc. SPIE 9679, AOPC 2015: Optical Fiber Sensors and Applications, 96790U (8 October 2015); https://doi.org/10.1117/12.2199784

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