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Strain and curvature‐independent temperature sensor based on an interferometer taper fabricated with a CO 2 laser
Author(s) -
Martins T. J. M.,
Marques M. B.,
Frazão O.
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29640
Subject(s) - curvature , materials science , optics , interferometry , cladding (metalworking) , wavelength , laser , microwave , temperature measurement , fiber optic sensor , optical fiber , optoelectronics , physics , composite material , geometry , mathematics , quantum mechanics
An optical fiber interferometer taper fabricated with a CO 2 laser is proposed for strain and curvature‐independent temperature measurement. Variations in temperature produce changes in the conditions of the interference between light traveling along the core and cladding and a linear behavior is verified for the relation between the wavelength of the resonant loss peak and temperature, yielding a sensitivity of 110 pm/°C for a range between 25 and 510°C. Both the applied strain and curvature only promote significant changes in the transmitted power, leaving the wavelength of the resonant loss peak approximately constant and rendering this optical sensing device a good strain and curvature‐independent temperature sensor. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:688–691, 2016
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