Discrimination of strain and temperature using Bragg gratings in microstructured and standard optical fibres

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Frazao, O (Author) Other; Carvalho, JP (Author) Other; Ferreira, LA (Author) Other; Araujo, FM (Author) Other; Santos, JL (Author) FCUP

Journal

Title: Measurement Science and Technology

Vol. 16

Pages: 2109-2113

ISSN: 0957-0233

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 65 Citations

Scopus - 82 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-000-16D

DOI: 10.1088/0957-0233/16/10/028

Abstract (EN): In this work two sensing heads based on fibre Bragg grating structures are demonstrated, one for temperature independent measurement of strain and the other for simultaneous measurement of these two parameters. The first one relies on a single Bragg grating inscription in a microstructured optical fibre, resulting for two input orthogonal polarizations in two distinct resonance peaks with similar temperature sensitivities and different strain sensitivities. In the second structure two gratings were considered, one written in the same microstructured fibre and the other on a standard SMF fibre. Considerably different strain and temperature sensitivities were obtained for these two gratings, enabling simultaneous temperature and strain measurement with resolutions of +/- 1.5 degrees C and +/- 10.7 mu epsilon over a measurement range of 100 degrees C and 2000 mu epsilon, respectively.

Language: English

Type (Professor's evaluation): Scientific