A polarisation maintaining fibre Bragg grating interrogation system for multi-axis strain sensing

Author

Chen-Chun Ye ; Staines, S.E. ; James, S.W. ; Tatam, R.P.

Author_Institution

Sch. of Eng., Cranfield Univ., UK

fYear

2002

Firstpage

179

Abstract

In this paper we report the development of a FBG (fibre Bragg grating) interrogation system, that is capable of detecting independently the two orthogonally polarised signals reflected from a FBG fabricated in a PM (polarisation maintaining) fibre. The interrogation system imposes no limitation on the measurable strain. It is possible to detect a strain gradient by measuring independently the spectral broadening of the two polarised signals. The system has been used to fabricate and characterise FBGs in different PM fibres. As a demonstration of the feasibility of the interrogation system for multi-axis strain sensing, the transverse strain sensing characteristics of PM FBGs are presented.

Keywords

Bragg gratings; fibre optic sensors; optical fibre polarisation; optical fibre testing; spectral line broadening; strain measurement; strain sensors; FBG characterization; FBG fabrication; PM fibers; fibre Bragg gratings; measurable strain limitations; multi-axis strain sensing; orthogonally polarised reflected signals; polarisation maintaining FBG interrogation system; polarised signal spectral broadening; strain gradient detection; transverse strain sensing characteristics; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber couplers; Optical fiber polarization; Optical fiber sensors; Optical sensors; Strain measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th

Conference_Location

Portland, OR, USA

Print_ISBN

0-7803-7289-1

Type

conf

DOI

10.1109/OFS.2002.1000531

Filename

1000531