Simple sensing head geometry using fibre Bragg gratings for strain-temperature discrimination

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Frazao, O (Author) Other; Marques, L (Author) Other; Marques, JM (Author) Other; Baptista, JM (Author) Other; Santos, JL (Author) FCUP

Journal

Title: Optics Communications

Vol. 279

Pages: 68-71

ISSN: 0030-4018

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 19 Citations

Scopus - 27 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-6MV

DOI: 10.1016/j.optcom.2007.06.066

Abstract (EN): In this work, a simple sensing head geometry using fibre Bragg gratings for strain and temperature discrimination is presented. The sensing head geometry consists in one fibre with two FBGs bonded with a dummy optical fibre. Due to this new configuration, different strain sensitivities of the two FBGs are obtained (approximate to 65% difference), while temperature sensitivities remain the same. This difference in strain sensitivities is substantially larger than in all previously reported dual grating sensors. The obtained experimental errors were +/- 13.48 mu epsilon and +/- 2.44 degrees C, respectively. It is also demonstrated that this new configuration can be used as a temperature-independent strain sensor.

Language: English

Type (Professor's evaluation): Scientific