Experimental and numerical study on refractive index sensors based on fibre Bragg gratings inscribed in multimode fibre

被引：15
|
作者：
Kuhne, Jean Filipe [1 ]
Rocha, Ana Maria [2 ]
de Oliveira, Valmir [1 ]
Kalinowski, Hypolito Jose [2 ,3 ]
Kamikawachi, Ricardo Canute [1 ]
机构：
[1] Univ Tecnol Fed Parana, BR-80230901 Curitiba, Parana, Brazil
[2] Inst Telecomunicacoes, Campus Univ Santiago, P-3810193 Aveiro, Portugal
[3] Univ Fed Fluminense, Dept Engn Telecomunicacoes, BR-24210240 Niteroi, RJ, Brazil
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2018年 / 29卷 / 02期
关键词：
fibre Bragg grating; multimode optical fibre sensor; refractive index measurement; HYDROGEN SENSOR; REFRACTOMETER; FILM;
D O I：
10.1088/1361-6501/aa9c52
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work is reported the experimental and numerical results of the refractive index response of etched fibre Bragg gratings written in a graded index multimode fibre. The responses of the modes coupled by the grating inscribed in a multimode fibre are compared with the mode coupled by a grating inscribed in single mode fibre. The results of this study show that the refractive index sensitivity and the dynamical range of etched fibre Bragg gratings written in multimode fibres are higher than the ones verified in single-mode fibres. The determination of oil-biodiesel blend concentrations are also compared as an example of practical applications. It is shown that a greater core diameter of the multimode fibre enables the Bragg gratings to exhibit enhanced sensitivity without requiring further fibre diameter reduction.
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收藏
页数：7
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