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Proceedings Paper

A SPR sensor based on twin-core fiber
Author(s): Yu Zhang; Yong Wei; Zhihai Liu; Enming Zhao; Yaxun Zhang; Libo Yuan; Jun Yang
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Paper Abstract

We propose and demonstrate a novel fiber surface plasmon resonance (SPR) sensor based on a twin-core fiber (TCF). We grind the TCF tip into a frustum wedge shape, and plate a 50nm sensing gold film on the end face, two 500nm reflected gold films on the side faces of the wedge. We launch light source into the core of the TCF by using the high accuracy three-dimensional adjusting mount and microscope objective system. This SPR probe can be combined with microfluidic chip, and realize the real-time monitoring of the refractive index (RI) sensing of flow liquid in the microfluidic channel. The probe successfully monitors the refractive index of liquid ranged from 1.33 to 1.37 and the average sensitivity reaches to 5213nm/RIU in the solution.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347P (28 September 2015); doi: 10.1117/12.2193871
Show Author Affiliations
Yu Zhang, Harbin Engineering Univ. (China)
Yong Wei, Harbin Engineering Univ. (China)
Zhihai Liu, Harbin Engineering Univ. (China)
Enming Zhao, Harbin Engineering Univ. (China)
Yaxun Zhang, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)
Jun Yang, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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