LPFG based Fiber Optic Sensor for Magnetic Field Measurement

被引：1
|
作者：
Gouveia, Carlos A. J. [1 ,2 ,3 ]
Coelho, Luis [2 ,3 ]
Franco, Marcos A. R. [4 ]
机构：
[1] INESC P&D Brasil, Rua Jose Caballero 15, BR-11055300 Santos, SP, Brazil
[2] Univ Porto, CAP INESC TEC INESC Technol & Sci, Rua Campo Alegre 687, P-4150179 Oporto, Portugal
[3] Univ Porto, FCUP Fac Sci, Rua Campo Alegre 687, P-4150179 Oporto, Portugal
[4] Inst Adv Studies IEAv, Tr Cel Ave Jose AA Amarante, BR-12228001 Sao Jose Dos Campos, SP, Brazil
来源：
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
关键词：
Magnetic field sensing; long period fiber gratings; high refractive index overlays; dispersion turning point; fiber optic sensors; SENSITIVITY; GRATINGS; ZNO; LASER;
D O I：
10.1117/12.2265303
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The design and modelling of a novel magnetic field sensor based on a long period fiber grating coated with a thin film of N doped ZnO is reported. The parameters of both, the grating and the thin film were carefully chosen to operate in the transition mode and near to the dispersion turning point. At this point, an LPFG shows its maximum sensitivity to external refractive index variations. The magnetic field induces variations in the coating refractive index, which changes the effective refractive index of the cladding mode and the consequent spectral response. In this work a sensitivity to the surrounding magnetic field of 2.9 nm/mT is reported with a maximum theoretical resolution of 2 mu T.
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收藏
页数：4
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