An interferometric demodulation method for visualizing and determining quasi-static strain by FBG sensors
Authors: Rocco A., Coppola G., Di Maio A., Ferraro P., Iodice M., De Natale P.
Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34 80078 Napoli Italy;
CNR – Istituto di Microelettronica e Microsistemi, Sezione di Napoli, Via P. Castellino 111, 80131, Napoli, Italy
Abstract: In this paper, we propose an interferometric approach for visualizing and measuring the quasi-static strain experienced by fibre Bragg grating sensors. The method makes use of a simple bi-polished silicon sample acting like an etalon tuneable filter. The Bragg wavelength shift can be evaluated by analysing the overall interferometric signal achieved by tuning the etalon tuneable filter angularly. A fast Fourier transform method is applied for phase retrieval. The choice of the silicon sample is determined by the low-cost and well-developed silicon technology and fabrication, the easy design and tuneability of the spectral response, and the possibility of integrating on the same sample also the circuitry for electronic control. The principle of operation of this method is described and results obtained by employing such a configuration are reported.
Journal/Review: MEASUREMENT SCIENCE & TECHNOLOGY
Volume: 17 (6) Pages from: 1485 to: 1490
KeyWords: Fiber Bragg Grating; ; Phase Retrieval; Strain measurement; Interrogating SystemDOI: 10.1088/0957-0233/17/6/028Citations: 3data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-12-03References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here