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

来源：

FOURTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS | 2010年 / 7653卷

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

页数：4

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