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


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.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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
Publication ISSN: 1941-0174
Last Modified: 27 Jun 2024 09:00
Date Deposited: 28 Nov 2016 15:10
Full Text Link: http://ieeexplo ... cument/7533484/
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-11-01
Published Online Date: 2016-08-04
Accepted Date: 2016-08-01
Submitted Date: 2016-06-02
Authors: Zhang, W. (ORCID Profile 0000-0002-3584-8541)
Webb, D.J. (ORCID Profile 0000-0002-5495-1296)



Version: Accepted Version

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