Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer

Ting Hao; Kin Seng Chiang

doi:10.1109/LPT.2017.2761981

Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer

Ting Hao
, Kin Seng Chiang^*

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

63 Citations (Scopus)

68 Downloads (CityUHK Scholars)

Abstract

A robust graphene-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a pair of 3-dB long-period fiber gratings is proposed and demonstrated for ammonia (NH₃) gas sensing. The sensor operates on the principle of changing the phase of the cladding mode of a fiber through changing the conductivity of the graphene coating by adsorbed NH₃ molecules, which gives rise to a shift in the interference spectrum with an amount that depends on the gas concentration. Our experimental sensor shows a sensitivity of ~3 pm/ppm for a gas concentration from ~10 to ~180 ppm. The proposed in-fiber MZI can serve as a generic platform for the development of fiber sensors and devices that incorporate two-dimensional materials.

Original language	English
Article number	8064735
Pages (from-to)	2035-2038
Journal	IEEE Photonics Technology Letters
Volume	29
Issue number	23
Online published	11 Oct 2017
DOIs	https://doi.org/10.1109/LPT.2017.2761981
Publication status	Published - 1 Dec 2017

Research Keywords

Gas detection
long-period fiber grating
optical fiber sensor
two-dimensional material

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Hao, T., & Chiang, K. S. (2017). Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer. IEEE Photonics Technology Letters, 29(23), 2035-2038. [8064735]. https://doi.org/10.1109/LPT.2017.2761981.

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title = "Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer",

abstract = "A robust graphene-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a pair of 3-dB long-period fiber gratings is proposed and demonstrated for ammonia (NH3) gas sensing. The sensor operates on the principle of changing the phase of the cladding mode of a fiber through changing the conductivity of the graphene coating by adsorbed NH3 molecules, which gives rise to a shift in the interference spectrum with an amount that depends on the gas concentration. Our experimental sensor shows a sensitivity of \textasciitilde{}3 pm/ppm for a gas concentration from \textasciitilde{}10 to \textasciitilde{}180 ppm. The proposed in-fiber MZI can serve as a generic platform for the development of fiber sensors and devices that incorporate two-dimensional materials.",

keywords = "Gas detection, long-period fiber grating, optical fiber sensor, two-dimensional material",

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N2 - A robust graphene-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a pair of 3-dB long-period fiber gratings is proposed and demonstrated for ammonia (NH3) gas sensing. The sensor operates on the principle of changing the phase of the cladding mode of a fiber through changing the conductivity of the graphene coating by adsorbed NH3 molecules, which gives rise to a shift in the interference spectrum with an amount that depends on the gas concentration. Our experimental sensor shows a sensitivity of ~3 pm/ppm for a gas concentration from ~10 to ~180 ppm. The proposed in-fiber MZI can serve as a generic platform for the development of fiber sensors and devices that incorporate two-dimensional materials.

AB - A robust graphene-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a pair of 3-dB long-period fiber gratings is proposed and demonstrated for ammonia (NH3) gas sensing. The sensor operates on the principle of changing the phase of the cladding mode of a fiber through changing the conductivity of the graphene coating by adsorbed NH3 molecules, which gives rise to a shift in the interference spectrum with an amount that depends on the gas concentration. Our experimental sensor shows a sensitivity of ~3 pm/ppm for a gas concentration from ~10 to ~180 ppm. The proposed in-fiber MZI can serve as a generic platform for the development of fiber sensors and devices that incorporate two-dimensional materials.

KW - Gas detection

KW - long-period fiber grating

KW - optical fiber sensor

KW - two-dimensional material

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DO - 10.1109/LPT.2017.2761981

M3 - RGC 21 - Publication in refereed journal

SN - 1041-1135

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JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 23

M1 - 8064735

ER -

Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer

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GRF: Graphene Photonic Devices Based on Long-period Grating Structures

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Graphene-Based Ammonia-Gas Sensor Using In-Fiber Mach-Zehnder Interferometer

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GRF: Graphene Photonic Devices Based on Long-period Grating Structures

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