Scientific Results

Performance evaluation of fiber Bragg grating sensors by digital holographic technique, strain gauge measurement

Year: 2007

Authors: Di Maio A., Rocco A., Ferraro P., De Rosa M., De Natale P., De Nicola S., Finizio A., Pierattini G., Coppola G., Iodice M., Striano V.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Sezione di Napoli, Comprensorio Olivetti, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Consiglio Nazionale delle Ricerche, Istituto di Cibernetica “E. Caianiello”,
Comprensorio Olivetti, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Consiglio Nazionale delle Ricerche, Istituto per la Microelettronica e Microsistemi, Sezione di Napoli, Via P. Castellino 111, 80131 Napoli, Italy

Abstract: In view of the growing interest for non-destructive tests of materials, geodynamical monitoring and in general remote sensing, there is a great effort to bring practical optical sensors from research labs to industrial and environmental applications. In this paper, we employ digital holographic technique as an efficient tool for evaluating the strain measurement capability of fiber Bragg gratings (FBG). A cantilever beam has been employed as a test structure under loading test. The strain measurements results obtained by fiber-based sensors have been compared to those obtained by using full-field digital holographic technique and point-wise strain gauge sensors glued on the same cantilever beam. A simple theoretical model is also presented to interpret and compare the experimental results coming from different techniques. (c) 2006 Elsevier Ltd. All rights reserved.

Journal/Review: OPTICS AND LASERS IN ENGINEERING

Volume: 45 (3)      Pages from: 385  to: 389

KeyWords: Bragg cells; Cantilever beams; Holography; Remote sensing; Strain gages; Strain measurement, Digital holographic technique; Fiber Bragg grating sensors; Geodynamical monitoring; Strain gauge sensors, Optical sensors
DOI: 10.1016/j.optlaseng.2005.06.020

Citations: 1
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