期刊
MEASUREMENT
卷 163, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2020.107927
关键词
Refractive index sensor; D-shaped fiber structure; Graphene; Sodium nitrate; Fiber ring laser
资金
- Universiti Teknologi Malaysia [Q. K130000.2543.17H26]
This paper demonstrates a low-cost robust refractive index (RI) sensor based on a sensing structure realized with graphene-coated D-shaped fiber structure. The proposed sensing structure is of 5-dB insertion loss single mode fibers fabricated by means of side polishing; drop casting is used for the graphene coating that would act as a sensing layer to enhance the sensitivity of the sensing probe. Observations showed that the output power decreased from 7.17 dBm to 5.85 dBm with sensitivity of 0.223%/dBm and linearity of 99% as six different concentrations of sodium nitrate that varies from 1 to 7% were tested on the sensor probe. These results came from the interaction of propagating light in the evanescent wave with the external changing environment. The resonant peak shifted to longer wavelength with increasing refractive index. The sensing structure was embedded onto a fiber ring laser as this combination offers high measurement resolution and increase their remote sensing capability. (C) 2020 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据