A SPR sensor based on twin-core fiber

Yu Zhang; Yong Wei; Zhihai Liu; Enming Zhao; Yaxun Zhang; Libo Yuan; Jun Yang

doi:10.1117/12.2193871

28 September 2015 A SPR sensor based on twin-core fiber

Yu Zhang, Yong Wei, Zhihai Liu, Enming Zhao, Yaxun Zhang, Libo Yuan, Jun Yang

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96347P (2015) https://doi.org/10.1117/12.2193871
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Yu Zhang, Yong Wei, Zhihai Liu, Enming Zhao, Yaxun Zhang, Libo Yuan, and Jun Yang "A SPR sensor based on twin-core fiber", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347P (28 September 2015); https://doi.org/10.1117/12.2193871

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