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Proceedings Paper

Highly sensitive refractive index sensor based on two cascaded microfiber knots with Vernier effect
Author(s): Zhilin Xu; Qizhen Sun; Weihua Jia; Perry Ping Shum; Deming Liu
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Paper Abstract

A highly sensitive refractive index (RI) sensor based on two cascaded microfiber knots with vernier effect is proposed and demonstrated by theoretical arithmetic. Deriving from high proportional evanescent field of microfiber and sharp spectrum fringes induced by vernier effect, a slight change of ambient RI will cause large variation of effective RI and significant wavelength shift of resonant peaks, indicating high sensitivity and resolution of the proposed compound resonator. Numerical analysis demonstrates a high sensitivity of 10000nm/RIU and a resolution of 5.57×10−5 RIU at the ambient RI around 1.33 for the fiber diameter of 1μm and cavity radii of R1 = 500μm, R2 = 547.62μm

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915786 (2 June 2014); doi: 10.1117/12.2059467
Show Author Affiliations
Zhilin Xu, Huazhong Univ. of Science and Technology (China)
Qizhen Sun, Huazhong Univ. of Science and Technology (China)
Weihua Jia, Huazhong Univ. of Science and Technology (China)
Perry Ping Shum, Huazhong Univ. of Science and Technology (China)
Nanyang Technological Univ. (Singapore)
Deming Liu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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