Graphene-based D-shaped fiber multicore mode interferometer for chemical gas sensing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Y. Wu
  • B. C. Yao
  • A. Q. Zhang
  • X. L. Cao
  • Z. G. Wang
  • Y. J. Rao
  • Y. Gong
  • W. Zhang
  • Y. F. Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)6030-6033
Journal / PublicationOptics Letters
Volume39
Issue number20
Online published15 Oct 2014
Publication statusPublished - 15 Oct 2014

Abstract

In this Letter, a graphene-coated D-shaped fiber (GDF) chemical gas sensor is proposed and demonstrated. Taking advantage of both the graphene-induced evanescent field enhancement and the in-fiber multimode interferometer, the GDF shows very high sensitivity for polar gas molecule adsorptions. An extinction ratio of up to 28 dB within the free spectrum range of ∼30 nm in the transmission spectrum is achieved. The maximum sensitivities for NH3 and H2O gas detections are ∼0.04 and ∼0.1 ppm, respectively. A hybrid sensing scheme with such compactness, high sensitivity, and online monitoring capabilities may pave the way for others to explore a series of graphene-based lab-on-fiber devices for biochemical sensing.

Citation Format(s)

Graphene-based D-shaped fiber multicore mode interferometer for chemical gas sensing. / Wu, Y.; Yao, B. C.; Zhang, A. Q. et al.
In: Optics Letters, Vol. 39, No. 20, 15.10.2014, p. 6030-6033.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review