Highly sensitive refractive index sensor based on cascaded microfiber knots with Vernier effect

Zhilin Xu; Qizhen Sun; Borui Li; Yiyang Luo; Wengao Lu; Deming Liu; Perry Ping Shum; Lin Zhang

doi:10.1364/OE.23.006662

Highly sensitive refractive index sensor based on cascaded microfiber knots with Vernier effect

Zhilin Xu, Qizhen Sun, Borui Li, Yiyang Luo, Wengao Lu, Deming Liu, Perry Ping Shum, Lin Zhang

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

Abstract

We propose and experimentally demonstrate a refractive index (RI) sensor based on cascaded microfiber knot resonators (CMKRs) with Vernier effect. Deriving from high proportional evanescent field of microfiber and spectrum magnification function of Vernier effect, the RI sensor shows high sensitivity as well as high detection resolution. By using the method named "Drawing-Knotting-Assembling (DKA)", a compact CMKRs is fabricated for experimental demonstration. With the assistance of Lorentz fitting algorithm on the transmission spectrum, sensitivity of 6523nm/RIU and detection resolution up to 1.533 x 10^-7 RIU are obtained in the experiment which show good agreement with the numerical simulation. The proposed all-fiber RI sensor with high sensitivity, compact size and low cost can be widely used for chemical and biological detection, as well as the electronic/magnetic field measurement

Original language	English
Pages (from-to)	6662-6672
Number of pages	11
Journal	Optics Express
Volume	23
Issue number	5
Early online date	3 Mar 2015
DOIs	https://doi.org/10.1364/OE.23.006662
Publication status	Published - 9 Mar 2015

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https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-5-6662

Cite this

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abstract = "We propose and experimentally demonstrate a refractive index (RI) sensor based on cascaded microfiber knot resonators (CMKRs) with Vernier effect. Deriving from high proportional evanescent field of microfiber and spectrum magnification function of Vernier effect, the RI sensor shows high sensitivity as well as high detection resolution. By using the method named {"}Drawing-Knotting-Assembling (DKA){"}, a compact CMKRs is fabricated for experimental demonstration. With the assistance of Lorentz fitting algorithm on the transmission spectrum, sensitivity of 6523nm/RIU and detection resolution up to 1.533 x 10-7 RIU are obtained in the experiment which show good agreement with the numerical simulation. The proposed all-fiber RI sensor with high sensitivity, compact size and low cost can be widely used for chemical and biological detection, as well as the electronic/magnetic field measurement",

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AU - Xu, Zhilin

AU - Sun, Qizhen

AU - Li, Borui

AU - Luo, Yiyang

AU - Lu, Wengao

AU - Liu, Deming

AU - Shum, Perry Ping

AU - Zhang, Lin

PY - 2015/3/9

Y1 - 2015/3/9

N2 - We propose and experimentally demonstrate a refractive index (RI) sensor based on cascaded microfiber knot resonators (CMKRs) with Vernier effect. Deriving from high proportional evanescent field of microfiber and spectrum magnification function of Vernier effect, the RI sensor shows high sensitivity as well as high detection resolution. By using the method named "Drawing-Knotting-Assembling (DKA)", a compact CMKRs is fabricated for experimental demonstration. With the assistance of Lorentz fitting algorithm on the transmission spectrum, sensitivity of 6523nm/RIU and detection resolution up to 1.533 x 10-7 RIU are obtained in the experiment which show good agreement with the numerical simulation. The proposed all-fiber RI sensor with high sensitivity, compact size and low cost can be widely used for chemical and biological detection, as well as the electronic/magnetic field measurement

AB - We propose and experimentally demonstrate a refractive index (RI) sensor based on cascaded microfiber knot resonators (CMKRs) with Vernier effect. Deriving from high proportional evanescent field of microfiber and spectrum magnification function of Vernier effect, the RI sensor shows high sensitivity as well as high detection resolution. By using the method named "Drawing-Knotting-Assembling (DKA)", a compact CMKRs is fabricated for experimental demonstration. With the assistance of Lorentz fitting algorithm on the transmission spectrum, sensitivity of 6523nm/RIU and detection resolution up to 1.533 x 10-7 RIU are obtained in the experiment which show good agreement with the numerical simulation. The proposed all-fiber RI sensor with high sensitivity, compact size and low cost can be widely used for chemical and biological detection, as well as the electronic/magnetic field measurement

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Highly sensitive refractive index sensor based on cascaded microfiber knots with Vernier effect

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