Interrogation of a fiber Bragg grating using a mechanically induced long-period fiber grating

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Gaspar M Rego (Autor) Outra; Henrique M Salgado (Autor) FEUP; Jose L Santos (Autor) FCUP

Revista

Título: IEEE Sensors Journal

Vol. 6 Nº 6

Páginas: 1592-1595

ISSN: 1530-437X

Editora: IEEE

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 23 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia electrotécnica, electrónica e informática

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia electrotécnica

Outras Informações

ID Authenticus: P-004-FPX

DOI: 10.1109/jsen.2006.883850

Abstract (EN): A fiber-sensing scheme with controlled sensitivity comprising a fiber Bragg grating (FBG) and a mechanically induced long-period fiber grating (MLPFG) is presented. The FBG was written by exposing the fiber to 248-nm UV laser radiation such that the Bragg wavelength is localized on the slope of a resonant band of a mechanical grating, which was produced by winding a nylon string around a fiber/grooved tube set. The strength of that resonant band was altered by applying loads to the MLPFG. For different loads, the FBG was submitted to strain values of up to 2200 mu epsilon, in steps of 200 mu epsilon, during which the Bragg wavelength and the respective transmitted peak power through the MLPFG were recorded. It was demonstrated that by applying a weight with a value of 0.78 kg to the MLPFG, the sensitivity of the FBG interrogation technique to strain variations increased from 2.23 (without load) to 3.20 pW/mu epsilon.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4