2011•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Refractive index sensing by a periodical pressure on a single-mode fiber
Xiaojun Zhou, Shenghui Shi, Zhiyao Zhang, Xiaoyun Li, Yong Liu
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Abstract
A refractive index sensor using a pressure-induced long-period grating is proposed and demonstrated. The sensing element is made of a composite optical waveguide based on a single-mode fiber. The experimental results show that the sensitivity for LP14 mode resonance is 72nm/RIU (refractive index unit) when the medium refractive index varies from 1.33 to 1.43.