PMMA based optical fiber Bragg grating for measuring moisture in transformer oil

Zhang, W. and Webb, D.J. (2016). PMMA based optical fiber Bragg grating for measuring moisture in transformer oil. IEEE Photonics Technology Letters, 28 (21), pp. 2427-2430.

Abstract

Water contamination can cause serious problems that compromise in transformer's safe operation and reduce its lifetime. Online monitoring of moisture concentration in transformer oil would permit the control of moisture buildup. This letter presents a direct optical measurement of moisture concentration in transformer oil using a poly(methyl methacrylate) (PMMA)-based optical fiber Bragg grating (POFBG). The refractive index and volume of PMMA-based optical fiber vary with the moisture in the surrounding transformer oil, changing the reflecting wavelength of the grating. A sensitivity of POFBG wavelength change to moisture content of 29 pm/ppm is demonstrated in this letter, indicating detectable water content better than 0.05 ppm.

Publication DOI: https://doi.org/10.1109/LPT.2016.2598145
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: equilibrium relative humidity,Fiber Bragg gratings,moisture control,polymer optical fiber,Electronic, Optical and Magnetic Materials,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Full Text Link: http://ieeexplo ... cument/7533484/
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2016-11-01
Authors: Zhang, W. ( 0000-0002-3584-8541)
Webb, D.J. ( 0000-0002-5495-1296)

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Version: Accepted Version


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