Temperature-strain discrimination using a wavelength-division-multiplexed chirped in-fibre-Bragg-grating/extrinsic Fabry-Perot sensor system

Author

Rao, Y.J. ; Zeng, X.K. ; Wang, Y.P. ; Zhu, T. ; Ran, Z.L. ; Zhang, L. ; Bennion, I.

Author_Institution

Dept. of Optoelectronic Eng., Chongqing Univ., China

fYear

2002

Firstpage

207

Abstract

In this letter, we present a novel sensor approach allowing fast measurement of temperature. It consists of a chirped fibre Bragg grating (CFBG) and an extrinsic Fabry-Perot interferometric sensor (EFPI) in series. Both EFPI and CFBG are well integrated to provide local strain and temperature information respectively, using wavelength-division-multiplexed (WDM) technique. As the wavelength-shift of the CFBG is detected via intensity variation, the speed for temperature measurement can be very high (<0.1 ms). Also, there is little cross-talk between the CFBG and the EFPI due to the introduction of WDM.

Keywords

Bragg gratings; Fabry-Perot interferometers; chirp modulation; fibre optic sensors; strain sensors; temperature sensors; wavelength division multiplexing; chirped in-fibre Bragg grating; extrinsic Fabry-Perot interferometer; optical fibre sensor; strain measurement; temperature measurement; wavelength division multiplexing; Bragg gratings; Chirp; Fabry-Perot; Fiber gratings; Optical fiber sensors; Sensor systems; Temperature measurement; Temperature sensors; Wavelength division multiplexing; 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.2002.1000538

Filename

1000538