Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination

Author

Patrick, H.J. ; Williams, G.M. ; Kersey, A.D. ; Pedrazzani, J.R. ; Vengsarkar, A.M.

Author_Institution

Div. of Opt. Sci., Naval Res. Lab., Washington, DC, USA

Volume

8

Issue

9

fYear

1996

Firstpage

1223

Lastpage

1225

Abstract

We demonstrate a novel sensor which uses the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating to discriminate between strain and temperature induced wavelength shifts. Sensor interrogation is performed entirely on the fiber Bragg grating reflection signals. Strain and temperature were simultaneously measured to /spl plusmn/9 μstrain and /spl plusmn/1.5/spl deg/C over a wide range of conditions.

Keywords

diffraction gratings; fibre optic sensors; optical fibres; strain measurement; strain sensors; temperature measurement; temperature sensors; fiber Bragg grating reflection signals; fiber Bragg gratings; fibre sensors; hybrid fiber Bragg grating; long period fiber grating; long period fiber grating sensor; sensor interrogation; strain discrimination; strain induced wavelength shifts; strain measurement; strain response; temperature discrimination; temperature induced wavelength shifts; temperature measurement; temperature response; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber sensors; Reflection; Strain measurement; Temperature distribution; Temperature measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.531843

Filename

531843