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Title: Twist dependencies of strain and temperature sensitivities of perfluorinated graded-index polymer optical fiber Bragg gratings
Authors: Mizuno, Yosuke 
Ma, Tianyi 
Ishikawa, Ryo 
Lee, Heeyoung 
Theodosiou, Antreas 
Kalli, Kyriacos 
Nakamura, Kentaro 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering
Keywords: Chemical sensors;Plastic optical fibers;Fiber Bragg gratings;Temperature sensing
Issue Date: 1-Aug-2019
Source: Applied Physics Express, vol. 12, no. 8, articl. no. 082007
Volume: 12
Issue: 8
Journal: Applied Physics Express 
Abstract: We measure the twist dependence of the reflected spectrum of a fiber Bragg grating (FBG) inscribed in a perfluorinated graded-index (PFGI) polymer optical fiber (POF). With increasing twist, the strain sensitivity decreases with a coefficient of -34.2 pm/%/turns/m, while the temperature sensitivity increases with a coefficient of 0.39 pm/°C/turns/m. At a twist of 150 turns m-1, the temperature sensitivity is 3 times higher than that with no twist. The controllability of the strain and temperature coefficients without considerable cost is beneficial not only to highly sensitive temperature sensing but also discriminative sensing of strain and temperature using two PFGI-POF-FBGs.
ISSN: 1882-0786
DOI: 10.7567/1882-0786/ab3013
Rights: © Institute of Physics
Attribution-NonCommercial-NoDerivs 3.0 United States
Type: Article
Affiliation : Tokyo Institute of Technology 
Cyprus University of Technology 
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