Dynamic Interrogation of Long Period Gratings with Modulated Fibre Bragg Gratings

被引:0
|
作者
Carvalho, J. P. [1 ,2 ]
Coelho, L. [1 ]
Correia, L. [3 ]
Frazao, O. [1 ]
Jorge, P. A. S. [1 ]
Baptista, J. M. [1 ,4 ]
Dias, I. [1 ]
Santos, J. L. [1 ,2 ]
Weyl, J. [5 ]
Pontes, M. J. [6 ]
Martinez, M. A. [7 ]
Barbero, A. P. [8 ]
Ribeiro, R. M. [8 ]
Abelem, A. J. G. [5 ]
Giraldi, M. T. R. [3 ]
机构
[1] INESC Porto, Rua Campo Alegre 687, P-4169007 Oporto, Portugal
[2] Univ Porto, Fac Ciencias, P-4169007 Porto, Portugal
[3] IME, Rio De Janeiro, Brazil
[4] Univ Madeira, Ctr Competencia Ciencias Exacts & Engn, P-9000390 Funchal, Portugal
[5] Fed Univ Para, Fac Engn Comp, Belem, Para, Brazil
[6] Univ Fed Espirito Santo, Vitoria, Brazil
[7] CEFET RJ, Dept Elect Engn, Rio De Janeiro, Brazil
[8] Univ Fed Fluminense, Dept Engn Telecommun, Niteroi, RJ, Brazil
关键词
Optical fibre sensors; long period gratings; fibre Bragg gratings; sensor interrogation; TEMPERATURE; SENSORS;
D O I
10.1117/12.866444
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
It is reported a LPG dynamic interrogation technique based on the modulation of fibre Bragg gratings located in the readout unit that permits to attenuate the effect of the 1/f noise of the electronics in the resolution of the LPG-based sensing head. The concept is tested to detect variations of the external refractive index and a resolution of 2.0x10 (4) NIR was achieved without system optimization. Additionally, the effect in the sensor resolution when introducing Erbium and Raman optical amplification is experimentally investigated.
引用
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页数:4
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