Title :
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
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2378072
