Graphene/PVA coated D-shaped fiber for sodium nitrate sensing
Document Type
Article
Publication Date
12-1-2021
Abstract
A graphene/Polyvinyl alcohol (PVA) coated D-shaped fiber structure for sensing sodium nitrate solutions is proposed in this paper. D-shaped single mode fiber (SMF) coated with graphene/PVA was used as a sensor for sodium nitrate liquid solutions with the concentration range of 1-7%. After monitoring the output power and spectral transmission characteristics of the sensor, the graphene/PVA coated sensor showed an improved performance over the uncoated structure. The evanescent mode of the side-polished fiber and the interaction between the nitrate ions and the coating graphene improved the sensor's performance. The graphene/PVA coated sensor had sensitivity and linearity of 0.390 dBm/% and 99% compared to the uncoated sensor sensitivity and linearity of 0.117 dBm/% and 98% respectively. This shows the advantage of using D-shaped fiber coated with graphene and PVA to detect sodium nitrate concentrations. (c) 2021 Elsevier B.V. All rights reserved.
Keywords
Sodium nitrate, D-shaped fiber, Side polished fiber, Fiber optics sensor
Divisions
sch_ecs
Funders
World Class Research Scheme (2020) through Airlangga University [ 444/UN3.14/PT/2020],INTI Research Grant Scheme 2020 [INTI-FITS-03-2020]
Publication Title
Sensors and Actuators A: Physical
Volume
332
Issue
2
Publisher
Elsevier
Publisher Location
PO BOX 564, 1001 LAUSANNE, SWITZERLAND