Refractive index sensor based on SPR in symmetrically etched plastic optical fibers

Al-Qazwini, Y. and Noor, A.S.M. and Al-Qazwini, Z. and Yaacob, M.H. and Harun, Sulaiman Wadi and Mahdi, M.A. (2016) Refractive index sensor based on SPR in symmetrically etched plastic optical fibers. Sensors and Actuators A: Physical, 246. pp. 163-169. ISSN 0924-4247, DOI

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In this work, we fabricate and characterize a surface plasmon resonance sensor based on etched plastic optical fibers. The etching method used ensures the geometrical circular symmetry of the optical fiber. The sensor was tested by immersion in sensing solutions of different refractive indices and the transmittance is measured using a spectrometer system. The sensor performance in terms of sensitivity and detection accuracy can be controlled by adjusting the design parameters such as gold thickness, residual fiber thickness, and sensing length. We realized a sensitive, cost-effective, and robust sensor suitable for aqueous media sensing by reducing the overall fiber thickness up to 964 μm with a sensing length of 10 mm coated with a thin gold film of around 55 nm. The demonstrated sensor exhibits a sensitivity of 1600 nm/RIU and a full width at half maximum of around 154 nm.

Item Type: Article
Funders: Universiti Putra Malaysia’s Research University Grant Schemes (Refs: 05-01-12-1626RU and 05-02-12-2015RU), Ministry of Higher Education, Malaysia’s Fundamental Research Grant Scheme (Ref: 03-04-10-795FR)
Uncontrolled Keywords: Refractive index sensor; Surface plasmon resonance; Sensitivity; FWHM; Plastic optical fiber
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Nov 2017 06:27
Last Modified: 02 Jan 2019 03:11

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