Group-Delay-Based Temperature Sensing in Linearly-Chirped Fiber Bragg Gratings Using a Kerr Phase-Interrogator

Author

Yang Lu ; Baker, Chams ; Liang Chen ; Xiaoyi Bao

Author_Institution

Dept. of Phys., Univ. of Ottawa, Ottawa, ON, Canada

Volume

33

Issue

2

fYear

2015

fDate

Jan.15, 15 2015

Firstpage

381

Lastpage

385

Abstract

We present a novel temperature sensor based on temperature dependence of reflection group-delay in a linearly chirped fiber Bragg grating. The reflection group-delay of a chirped grating changes with temperature leading to a variation in the phase of a sinusoidal optical signal reflected from the grating. A Kerr phase-interrogator converts the phase variation into power variation allowing for high-precision temperature sensing. A temperature sensor with a resolution of 0.0089°C and a sensitivity of 1.122 rad/°C is experimentally demonstrated.

Keywords

Bragg gratings; fibre optic sensors; optical Kerr effect; temperature sensors; Kerr phase-interrogator; group-delay-based temperature sensing; linearly-chirped fiber Bragg gratings; phase variation; power variation; reflection group-delay; sinusoidal optical signal phase; temperature dependence; Fiber gratings; Optical sensors; Temperature measurement; Temperature sensors; Wavelength measurement; Bragg gratings; Kerr effect; Temperature measurement; fiber nonlinear optics; temperature measurement;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2378072

Filename

6974990