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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Optical fiber specklegram sensor analysis by speckle pattern division

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Fujiwara, Eric ; Marques dos Santos, Murilo Ferreira ; Suzuki, Carlos Kenichi
Total Authors: 3
Document type: Journal article
Source: APPLIED OPTICS; v. 56, n. 6, p. 1585-1590, FEB 20 2017.
Web of Science Citations: 22

An optical fiber specklegram sensor interrogation method based on speckle pattern fragmentation is presented. The acquired specklegram images are divided in a square grid, creating sub-images that are further processed by a correlation technique, allowing the quantification of localized changes in the specklegrams. The methodology was tested on the assessment of linear displacements using a microbending transducer, by evaluating different grid sizes. For a 5 x 5 grid, a 2.53 mm(-1) sensitivity over a 0.27 mm range was obtained, representing an extension of 237.5% in comparison to the standard interrogation technique. Therefore, the presented technique allows enhancing the sensor dynamic range without modifying the experimental setup. (C) 2017 Optical Society of America (AU)

FAPESP's process: 14/25080-0 - Development of an optical fiber based tactile sensor system for applications in mechatronics
Grantee:Eric Fujiwara
Support type: Regular Research Grants