Strain and curvature‐independent temperature sensor based on an interferometer taper fabricated with a CO2 laser. Issue 3 (March 2016)

• Record Type: Journal Article
• Authors: Martins, T. J. M.; Marques, M. B.; Frazão, O.
• Is Part Of: Microwave and optical technology letters. Volume 58:Issue 3(2016:Mar.)
• Page Start: 688
• Page End: 691
• Publication Date: 2016-03
• Subjects: optical fiber sensor -- taper -- interferometer; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.29640
• Languages: English
• ISSNs: 0895-2477

Abstract

ABSTRACT: An optical fiber interferometer taper fabricated with a CO2 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