Temperature-independent strain sensor based on a tapered Bragg fibre fabricated using a CO2 laser

• Type: Article in International Conference Proceedings Book
• Date: 2016

Authors

Martins, TJM (Author) Other; marques, mb (Author) FCUP; Roy, P (Author) Other; Jamier, R (Author) Other; Fevrier, S (Author) Other; Frazao, O (Author) FCUP

Conference proceedings International

Title: SIXTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

6th European Workshop on Optical Fibre Sensors

Univ Limerick, Limerick, IRELAND, MAY 31-JUN 03, 2016

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00K-M2Q

DOI: 10.1117/12.2235239

Abstract (EN): Temperature-independent strain measurement is achieved resorting to a taper fabricated on a Bragg fibre using a CO2 laser. The characteristic bimodal interference of an untapered Bragg fibre is rendered multimode after taper fabrication and the resulting transmission spectra are analysed as temperature and strain change. The intrinsic strain sensitivity exhibited by the Bragg fibre is increased 15 fold after tapering and reaches 22.68 pm/mu epsilon. The difference in wavelength shift promoted by variations in temperature and strain for the two fringes studied is examined and strain sensing with little temperature sensitivity is achieved, presenting a sensitivity of 2.86 pm/mu epsilon, for strain values up to 400 mu epsilon.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4