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Photonic Sensors

, Volume 7, Issue 2, pp 97–104 | Cite as

Optofluidic refractive index sensor based on partial reflection

  • Lei Zhang
  • Zhang Zhang
  • Yichuan Wang
  • Meiying Ye
  • Wei Fang
  • Limin Tong
Open Access
Regular

Abstract

We demonstrate a novel optofluidic refractive index (RI) sensor with high sensitivity and wide dynamic range based on partial reflection. Benefited from the divergent incident light and the output fibers with different tilting angles, we have achieved highly sensitive RI sensing in a wide range from 1.33 to 1.37. To investigate the effectiveness of this sensor, we perform a measurement of RI with a resolution of ca. 5.0×10–5 refractive index unit (RIU) for ethylene glycol solutions. Also, we have measured a series of liquid solutions by using different output fibers, achieving a resolution of ca. 0.52 mg/mL for cane surge. The optofluidic RI sensor takes advantage of the high sensitivity, wide dynamic range, small footprint, and low sample consumption, as well as the efficient fluidic sample delivery, making it useful for applications in the food industry.

Keywords

Optofluidic sensor refractive index partial reflection 

Notes

Acknowledgment

This work has been supported in part by National Basic Research Program of China (Nos. 2013CB328703 and 2014CB921303), and National Natural Science Foundation of China (61275217, 21407039).

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Copyright information

© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and EngineeringZhejiang UniversityHangzhouChina
  2. 2.College of Material, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhouChina

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