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Optical Engineering

Low-cost all-fiber Bragg grating sensing system for temperature and strain measurements
Author(s): Andrea Cusano; Giovanni Breglio; Michele Giordano; Luigi Nicolais
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Paper Abstract

A low-cost all-fiber Bragg grating sensing system for temperature and strain measurements is presented. Broadband interrogation and grating-based optical filtering are used to detect a strain- or temperature-induced Bragg wavelength shift with a resolution of 1 µε and 0.1°C. The passive nature of the grating demodulation enables dynamic measurements, limited only by the electronic circuitry involved in the system read out. The same system is also used for dynamic strain detection. A fiber grating is bonded to a piezoceramic actuator in different configurations. A laser-triangulation-based system is used as a reference measurements up to 10 kHz, while dynamic strain measurements by a Fiber Bragg grating (FBG) are carried out up to 50 kHz, demonstrating a dynamic resolution of ≈40 nε/(Hz)1/2.

Paper Details

Date Published: 1 August 2005
PDF: 7 pages
Opt. Eng. 44(8) 084402 doi: 10.1117/1.2031287
Published in: Optical Engineering Volume 44, Issue 8
Show Author Affiliations
Andrea Cusano, Univ. degli Studi del Sannio (Italy)
Giovanni Breglio, Univ. degli Studi di Napoli Federico II (Italy)
Michele Giordano, Univ. degli Studi di Napoli Federico II (Italy)
Luigi Nicolais, Univ. degli Studi di Napoli Federico II (Italy)


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