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Type: Artigo
Title: Optical Fiber Specklegram Sensor Analysis By Speckle Pattern Division
Author: Fujiwara
Eric; Marques dos Santos
Murilo Ferreira; Suzuki
Carlos Kenichi
Abstract: 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
Editor: Optical Soc Amer
Citation: Applied Optics. Optical Soc Amer, v. 56, p. 1585 - 1590, 2017.
Rights: fechado
Identifier DOI: 10.1364/AO.56.001585
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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