CHIRPED FIBER BRAGG GRATING CAVITY RING-DOWN FOR STRAIN SENSING USING AN OTDR

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Susana Silva (Autor) FCUP; Passos, DJ (Autor) Outra; marques, mb (Autor) FCUP; Frazao, O (Autor) FCUP

Revista

Título: Microwave and Optical Technology Letters

Vol. 57

Páginas: 1442-1444

ISSN: 0895-2477

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-00A-9DK

DOI: 10.1002/mop.29114

Abstract (EN): This work presents a fiber cavity ring down (CRD) configuration for the measurement of strain. An optical time-domain reflectometer (OTDR) was used to send impulses down into the fiber loop cavity, inside of which a chirped fiber Bragg grating was placed to act as a strain sensing element. This technique could provide strain results with both conventional CRD-based configuration and the OTDR. The CRD configuration provided a linear response to strain applied in the range 0-2000 epsilon, and a sensitivity of 1.34 ns/epsilon was obtained. For the same operation range, the OTDR interrogation allowed obtaining a periodic behavior due to fiber Bragg grating scanning of the wavelength peaks of the multimode laser source while increasing strain. It is shown that the OTDR interrogation method provide a ring-down time response of about 8 s which is a great improvement when compared to the conventional CRD configuration (23 s). (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1442-1444, 2015

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3