Bragg Fibre for Sensing Applications

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

Frazao, O (Author) FCUP; Baptista, JM (Author) Other; Santos, JL (Author) FCUP; Roy, P (Author) Other; Jamier, R (Author) Other; Fevrier, S (Author) Other

Conference proceedings International

Title: PHOTONIC CRYSTAL FIBERS IV

Conference on Photonic Crystal Fibers IV

Brussels, BELGIUM, APR 14-16, 2010

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 3 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-003-C91

DOI: 10.1117/12.854391

Abstract (EN): In this work, we propose to take advantage of properties of a Bragg fibre for optical sensing. The Bragg fibre exhibits three concentric high refractive index layers embedded in pure silica and surrounding a 35 mu m diameter core. A short (0.3 m long) piece of Bragg fibre slightly multimode, is used to elaborate an intermodal interferometer, the spectral response of which exhibits a fringe pattern that depends on the operating wavelength, which can therefore be used as a sensor. The two modes considered were found to be the fundamental LP(01) and the high-order mode LP(02). The sensor has been characterized in strain and temperature and presents a sensitivity of - 1.09 pm/mu epsilon and 14.1 pm/degrees C respectively. The sensor demonstrated insensitivity to curvature thanks to well known Bragg fibre properties.

Language: English

Type (Professor's evaluation): Scientific