Next Article in Journal
Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
Next Article in Special Issue
Magnetic Field Sensing Based on Bi-Tapered Optical Fibers Using Spectral Phase Analysis
Previous Article in Journal
A Multi-Disciplinary Approach to Remote Sensing through Low-Cost UAVs
Previous Article in Special Issue
A Point Temperature Sensor Based on Upconversion Emission in Er3+/Yb3+ Codoped Tellurite-Zinc-Niobium Glass
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(6), 1415; doi:10.3390/s17061415

High Sensitivity Refractometer Based on Reflective Smf-Small Diameter No Core Fiber Structure

Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK
Photonics Research Centre, Dublin Institute of Technology, Dublin 8, Ireland
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
School of Electrical, Electronic and Computer Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 23 March 2017 / Revised: 29 May 2017 / Accepted: 14 June 2017 / Published: 16 June 2017
View Full-Text   |   Download PDF [1706 KB, uploaded 16 June 2017]   |  


A high sensitivity refractive index sensor based on a single mode-small diameter no core fiber structure is proposed. In this structure, a small diameter no core fiber (SDNCF) used as a sensor probe, was fusion spliced to the end face of a traditional single mode fiber (SMF) and the end face of the SDNCF was coated with a thin film of gold to provide reflective light. The influence of SDNCF diameter and length on the refractive index sensitivity of the sensor has been investigated by both simulations and experiments, where results show that the diameter of SDNCF has significant influence. However, SDNCF length has limited influence on the sensitivity. Experimental results show that a sensitivity of 327 nm/RIU (refractive index unit) has been achieved for refractive indices ranging from 1.33 to 1.38, which agrees well with the simulated results with a sensitivity of 349.5 nm/RIU at refractive indices ranging from 1.33 to 1.38. View Full-Text
Keywords: optical fiber sensor; refractometer; single mode-multimode-single mode (SMS) structure; no core fiber optical fiber sensor; refractometer; single mode-multimode-single mode (SMS) structure; no core fiber

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Zhou, G.; Wu, Q.; Kumar, R.; Ng, W.P.; Liu, H.; Niu, L.; Lalam, N.; Yuan, X.; Semenova, Y.; Farrell, G.; Yuan, J.; Yu, C.; Zeng, J.; Tian, G.Y.; Fu, Y.Q. High Sensitivity Refractometer Based on Reflective Smf-Small Diameter No Core Fiber Structure. Sensors 2017, 17, 1415.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top