Fiber-Optic Cavity Ring Down Using an Added-Signal for Curvature Sensing

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

Autores

Susana Silva (Autor) FCUP; Biswas, P (Autor) Outra; Bandyopadhyay, S (Autor) Outra; Jorge, PAS (Autor) FCUP; marques, mb (Autor) FCUP; Frazao, O (Autor) FCUP

Revista

Título: IEEE Photonics Technology Letters

Vol. 27

Páginas: 2079-2082

ISSN: 1041-1135

Editora: IEEE

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: P-00G-NBK

DOI: 10.1109/lpt.2015.2453124

Abstract (EN): This letter presents a fiber-optic cavity ring down (CRD) configuration using an added-signal for curvature sensing. An optical time-domain reflectometer was used to send impulses down into the fiber loop cavity, inside of which a long period grating was placed to act as a sensing device. The added-signal was obtained by the sum of several conventional CRD impulses, thus providing an improvement on the curvature sensitivity when compared with the conventional CRD signal processing. A linear response to applied curvature in the range of 2.2-3.6 m(-1) was observed, and a sensitivity of 15.3 mu s/m(-1) was obtained. This result was found to be 20-fold the one obtained for the conventional CRD signal processing. The added-signal increases the optical power but increases as well the ring-down time due to the sum of the several loops that light travels inside the ring. A ring-down time response of 43.3 mu s was attained (versus 23.7 mu s for the conventional CRD signal processing).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4