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

Chen Liu, Qi Cai, Zhongyuan Sun, Baojian Xu, Jianlong Zhao, Lin Zhang, Xianfeng Chen

Research output: Chapter in Book/Published conference outputConference publication


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.

Original languageEnglish
Title of host publicationSixth European Workshop on Optical Fibre Sensors
EditorsElfed Lewis
Place of PublicationBellingham, WA (US)
Number of pages4
ISBN (Print)978-1-5106-0219-9
Publication statusPublished - 30 May 2016
Event6th European Workshop on Optical Fibre Sensors - Ireland, Limerick, Ireland
Duration: 31 May 20163 Jun 2016

Publication series

NameSPIE Proceedings
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045


Conference6th European Workshop on Optical Fibre Sensors
Abbreviated titleEWOFS 2016

Bibliographical note

-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.



  • APTES salinization
  • chemical sensor
  • graphene oxide
  • long period grating


Dive into the research topics of 'Fibre optic chemical sensor based on graphene oxide-coated long period grating'. Together they form a unique fingerprint.

Cite this