Chirped Bragg grating fabricated in fused fibre taper for strain-temperature discrimination

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

Authors

Frazao, O (Author) Other; Melo, M (Author) Other; Marques, PVS (Author) FCUP; Santos, JL (Author) FCUP

Journal

Title: Measurement Science and Technology

Vol. 16

Pages: 984-988

ISSN: 0957-0233

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 54 Citations

Scopus - 58 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-000-43H

DOI: 10.1088/0957-0233/16/4/010

Abstract (EN): In this work, two sensing heads based on the fibre Bragg gratings written in fused biconical fibre taper for simultaneous measurement of temperature and strain are proposed. In the first configuration a comparison between a uniform Bragg grating and a grating written on a tapered fibre section, resulting in a chirp grating, is evaluated. The second sensing head consists of two gratings written in two different regions of the taper section. This fibre taper has a different geometry in each conical section, achieved by stretching the fibre at different velocities during the fabrication process. These two configurations are based on the different strain and similar temperature sensitivities of the Bragg gratings used to discriminate the two physical parameters. The performances are assessed and compared. The second structure presents good performance and more sensitivity, compared to the first sensing head.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5