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Title: Functionalized fiber end superstructure fiber bragg grating refractive index sensor for heavy metal ion detection
Authors: Tan, Rex Xiao
Yap, Stephanie Hui Kit
Tan, Yung Chuen
Tjin, Swee Chuan
Ibsen, Morten
Yong, Ken Tye
Lai, Wenn Jing
Keywords: Fiber Bragg Gratings
Fiber Sensors
Issue Date: 2018
Source: Tan, R. X., Yap, S. H. K., Tan, Y. C., Tjin, S. C., Ibsen, M., Yong, K. T., et al. (2018). Functionalized fiber end superstructure fiber bragg grating refractive index sensor for heavy metal ion detection. Sensors, 18(6), 1821-.
Series/Report no.: Sensors
Abstract: We present a novel superstructure fiber Bragg grating fiber end sensor capable of detecting variations in refractive index (RI) of liquids and potentially that of gases, and demonstrated an application in the detection of heavy metal ions in water. The sensor is capable of sensing RI variations in the range of 1.333 to 1.470 with good sensitivity of up to 230 dB/RIU achieved for the RI range of 1.370 to 1.390. The sensor is capable of simultaneously measuring variations in ambient temperature along with RI. A simple chemical coating was employed as a chelating agent for heavy metal ion detection at the fiber end to demonstrate an possible application of the sensor. The coated fiber sensor can conclusively detect the presence of heavy metal ions with concentrations upwards of 100 ppm. RI sensing capability of the sensor is neither affected by temperature nor strain and is both robust and easily reproducible.
ISSN: 1424-8220
DOI: 10.3390/s18061821
Rights: © 2018 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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