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Functionalized fiber end superstructure fiber Bragg grating refractive index sensor for heavy metal ion detection

Functionalized fiber end superstructure fiber Bragg grating refractive index sensor for heavy metal ion detection
Functionalized fiber end superstructure fiber Bragg grating refractive index sensor for heavy metal ion detection

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.

Chemosensors, Fiber Bragg gratings, Fiber sensors
1424-8220
Tan, Rex Xiao
b1b8f8e5-3a4d-431e-9d8b-9f8824d821a6
Yap, Stephanie Hui Kit
06e01d5d-cb0a-4c03-b2d5-b144af2eb64f
Tan, Yung Chuen
8b616041-781f-497d-bcf7-3b9217a333b1
Tjin, Swee Chuan
507fa0fe-4697-4799-abe4-740a97ca5056
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Yong, Ken Tye
f6b81fb4-d014-41c7-92e5-d6edb2c78b3a
Lai, Wenn Jing
8a281998-3835-40dc-9e2c-e979bec8c11e
Tan, Rex Xiao
b1b8f8e5-3a4d-431e-9d8b-9f8824d821a6
Yap, Stephanie Hui Kit
06e01d5d-cb0a-4c03-b2d5-b144af2eb64f
Tan, Yung Chuen
8b616041-781f-497d-bcf7-3b9217a333b1
Tjin, Swee Chuan
507fa0fe-4697-4799-abe4-740a97ca5056
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Yong, Ken Tye
f6b81fb4-d014-41c7-92e5-d6edb2c78b3a
Lai, Wenn Jing
8a281998-3835-40dc-9e2c-e979bec8c11e

Tan, Rex Xiao, Yap, Stephanie Hui Kit, Tan, Yung Chuen, Tjin, Swee Chuan, Ibsen, Morten, Yong, Ken Tye and Lai, Wenn Jing (2018) Functionalized fiber end superstructure fiber Bragg grating refractive index sensor for heavy metal ion detection. Sensors, 18 (6). (doi:10.3390/s18061821).

Record type: Article

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.

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sensors-18-01821 - Version of Record
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More information

Accepted/In Press date: 3 June 2018
e-pub ahead of print date: 5 June 2018
Published date: 5 June 2018
Keywords: Chemosensors, Fiber Bragg gratings, Fiber sensors

Identifiers

Local EPrints ID: 421972
URI: https://eprints.soton.ac.uk/id/eprint/421972
ISSN: 1424-8220
PURE UUID: bd08b391-9b1d-4251-a50b-0248a87b3156

Catalogue record

Date deposited: 12 Jul 2018 16:30
Last modified: 02 Dec 2019 18:05

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