Curvature and Vibration Sensing Based on Core Diameter Mismatch Structures

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Fernandes, CS (Author) Other; Giraldi, MTMR (Author) Other; de Sousa, MJ (Author) Other; Costa, JCWA (Author) Other; Gouveia, C (Author) Other; Jorge, PAS (Author) FCUP; Franco, MAR (Author) Other

Journal

Title: IEEE Transactions on Instrumentation and Measurement

Vol. 65

Pages: 2120-2128

ISSN: 0018-9456

Publisher: IEEE

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 10 Citations

Other information

Authenticus ID: P-00M-3CH

DOI: 10.1109/tim.2016.2571378

Abstract (EN): Core diameter mismatch structures are proposed and experimentally investigated for curvature and vibration sensing. Two configurations are suggested, one approach uses a structure formed by splicing an uncoated short section of multimode fiber between two standard single-mode fibers (SMFs) single-mode-multimode-single-mode (SMS), combined to a fiber optical mirror at its end, and the other approach uses a structure made by splicing a section of SMF between two multimode fibers (SMSMS). In the curvature analysis, the proposed SMS sensor generates the destructive interference patterns when it is bent, varying only the attenuation of the optical signal without wavelength shifts. The SMSMS vibration sensor proved to be suitable to monitor very low frequencies such as 0.1 Hz. The configuration of the proposed sensors presents several interesting features, such as easy fabrication, low cost, high efficiency, and high sensitivity. These advantages make such sensors very useful in a wide range of applications, for instance, structural health monitoring.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9