Remote curvature fiber sensors using core mismatch structures and OTDR based interrogation

Cindy S. Fernandes; Maria Thereza M. Rocco Giraldi; Carlos J. Gouveia; Marco J. de Sousa; João C. W. A. Costa; Orlando Frazão; Pedro A. Jorge

doi:10.1117/12.2063008

22 August 2014 Remote curvature fiber sensors using core mismatch structures and OTDR based interrogation

Cindy S. Fernandes, Maria Thereza M. Rocco Giraldi, Carlos J. Gouveia, Marco J. de Sousa, João C. W. A. Costa, Orlando Frazão, Pedro A. Jorge

Author Affiliations +

Proceedings Volume 9286, Second International Conference on Applications of Optics and Photonics; 928646 (2014) https://doi.org/10.1117/12.2063008
Event: Second International Conference on Applications of Optics and Photonics, 2014, Aveiro, Portugal

Abstract

In this work, a remote curvature sensor using a standard OTDR as the interrogation system is presented. This approach uses a core diameter mismatch sensor which is formed by a short section of a multimode fiber, with a length of 3 mm, sandwiched between two singlemode fibers. In this case, the attenuation of the optical signal will vary as the fiber is bent allowing interrogating the sensor with OTDR technology. Preliminary results indicate a resolution range of ~0.0003 cm^{- 1}, sensitivity in the range of ~-208.46 dB/cm^-1 and a variation of 2.67 dB in the OTDR trace within the bend radius range.

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Cindy S. Fernandes, Maria Thereza M. Rocco Giraldi, Carlos J. Gouveia, Marco J. de Sousa, João C. W. A. Costa, Orlando Frazão, and Pedro A. Jorge "Remote curvature fiber sensors using core mismatch structures and OTDR based interrogation", Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 928646 (22 August 2014); https://doi.org/10.1117/12.2063008

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