Silva, Susana O and Biswas, P and Bandyopadhyay, S and Jorge, P A and Marques, M B and Frazao, O (2015) Curvature sensing using an added-signal in a fiber-optic cavity ring-down system. In: 24TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, SEP 28-OCT 02, 2015, BRAZIL.

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This work presents a fiber-optic Cavity Ring-Down (CRD) configuration using an added-signal for curvature sensing. An Optical Time-Domain Reflectometer (OTDR) was used to send impulses down into the fiber loop cavity, inside of which a long period grating (LPG) was placed to act as 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 to the conventional CRD signal processing. Sensitivity to applied curvature 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.

Item Type: Conference or Workshop Item (Paper)
Additional Information: 24th International Conference on Optical Fibre Sensors (OFS), Curitiba, BRAZIL, SEP 28-OCT 02, 2015
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 08 Jan 2016 06:27
Last Modified: 08 Jan 2016 06:27

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