Fibre optic chemical sensor based on graphene oxide-coated long period grating


In this work, a graphene oxide-coated long period fibre grating (GO-LPG) is proposed for chemical sensing application. Graphene oxide (GO) has been deposited on the surface of long period grating to form a sensing layer which significantly enhances the interaction between LPG propagating light and the surrounding-medium. The sensing mechanism of GO-LPG relies on the change of grating resonance intensity against surrounding-medium refractive index (SRI). The proposed GO-LPG has been used to measure the concentrations of sugar aqueous solutions. The refractive index sensitivities with 99.5 dB/RIU in low refractive index region (1.33-1.35) and 320.6 dB/RIU in high index region (1.42-1.44) have been achieved, showing an enhancement by a factor of 3.2 and 6.8 for low and high index regions, respectively. The proposed GO-LPG can be further extended to the development of optical biochemical sensor with advantages of high sensitivity, real-time and label-free sensing.

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Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: -Chen Liu; Qi Cai; Zhongyuan Sun; Baojian Xu; Jianlong Zhao; Lin Zhang and Xianfeng Chen; "Fibre optic chemical sensor based on graphene oxide-coated long period grating", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160V (May 30, 2016). Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI:
Event Title: 6th European Workshop on Optical Fibre Sensors
Event Type: Other
Event Location: Ireland
Event Dates: 2016-05-31 - 2016-06-03
Uncontrolled Keywords: APTES salinization,chemical sensor,graphene oxide,long period grating,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
ISBN: 978-1-5106-0219-9
Full Text Link: http://proceedi ... ticleid=2525061
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2016-05-30
Accepted Date: 2016-05-30
Authors: Liu, Chen
Cai, Qi
Sun, Zhongyuan
Xu, Baojian
Zhao, Jianlong
Zhang, Lin ( 0000-0002-1691-5577)
Chen, Xianfeng



Version: Published Version

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