Low-coherent WDM reflectometry for accurate fiber length monitoring

Author

Hui, R. ; Thomas, J. ; Allen, C. Allen ; Fu, B. ; Gao, S.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Kansas, Lawrence, KS, USA

Volume

15

Issue

1

fYear

2003

Firstpage

96

Lastpage

98

Abstract

A fiber-optic low-coherent reflectometer was developed to accurately monitor fiber length variation. A large length-coverage range was obtained by using a fiber Bragg grating array in a wavelength-division-multiplexing configuration. The polarization mismatch-induced signal fading was eliminated by applying a polarization spreading technique at the optical receiver and, therefore, no active polarization adjustment was necessary for long-term measurement.

Keywords

Bragg gratings; fading; fibre optic sensors; length measurement; measurement errors; optical fibre testing; reflectometry; wavelength division multiplexing; accurate fiber length monitoring; earth movement monitoring; fiber Bragg grating array; fiber length variation; fiber-optic low-coherent reflectometer; large length coverage range; low-coherent WDM reflectometry; optical receiver; polarization mismatch-induced signal fading; polarization spreading technique; wavelength-division-multiplexing configuration; Monitoring; Optical fiber polarization; Optical fiber sensors; Optical interferometry; Optical receivers; Optical refraction; Optical sensors; Optical variables control; Reflectometry; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.805842

Filename

1159074