An Interrogation Technique for Fiber Bragg Grating Sensors Based on Optical Time-Domain Reflectometry
Yu. N. Kulchina, O. B. Vitrika, A. V. Dyshlyuka, A. M. Shalaginb,
S. A. Babinb, and A. A. Vlasovb
aInstitute of Automation and Control Processes, Far-Eastern Branch, Russian Academy of Sciences,
Vladivostok, Russia, E-mail: anton_dys@iacp.dvo.ru
bInstitute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences,
Novosibirsk, Russia
Pages: 178-182
Abstract
A method for fiber Bragg grating (FBG) interrogation is proposed. The method rests on measuring the light intensity reflected from FBG sensors by means of a standard optical time-domain reflectometer. Multiple FBGs along the fiber optic line are interrogated through time division multiplexing. Specifications of FBGs enabling linear response of the sensors to strain and temperature are determined. The threshold sensitivity to strain is 0.8
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