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

dc.contributor.author Susana Oliveira Silva en
dc.contributor.author Biswas,P en
dc.contributor.author Bandyopadhyay,S en
dc.contributor.author Pedro Jorge en
dc.contributor.author Manuel Joaquim Marques en
dc.contributor.author Orlando Frazão en
dc.date.accessioned 2018-01-17T09:32:47Z
dc.date.available 2018-01-17T09:32:47Z
dc.date.issued 2015 en
dc.description.abstract 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). en
dc.identifier.uri http://repositorio.inesctec.pt/handle/123456789/6550
dc.identifier.uri http://dx.doi.org/10.1109/lpt.2015.2453124 en
dc.language eng en
dc.relation 4061 en
dc.relation 3565 en
dc.relation 4383 en
dc.relation 4678 en
dc.rights info:eu-repo/semantics/openAccess en
dc.title Fiber-Optic Cavity Ring Down Using an Added-Signal for Curvature Sensing en
dc.type article en
dc.type Publication en
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