Bending and orientational characteristics of long period gratings written in D-shaped optical fiber


Long period gratings (LPGs) were written into a D-shaped single-mode fiber. These LPGs were subjected to a range of curvatures, and it was found that as curvature increased, there was increasingly strong coupling to certain higher order cladding modes without the usual splitting of the LPGs stopbands. A bend-induced stopband yielded a spectral sensitivity of 12.55 nm · m for curvature and 2.2 × 10-2 nm°C-1 for temperature. It was also found that the wavelength separation between adjacent bend-induced stopbands varied linearly as a function of curvature. Blue and red wavelength shifts of the stopbands were observed as the sensor was rotated around a fixed axis for a given curvature; thus, in principle, this sensor could be used to obtain bending and orientational information. The behavior of the stopbands was successfully modeled using a finite element approach.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2004 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: curvature measurement,d-shaped optical fiber,long-period fiber gratings,optical fiber devices,temperature measurement,Electrical and Electronic Engineering,Instrumentation
Publication ISSN: 0018-9456
Last Modified: 02 Jan 2024 08:06
Date Deposited: 11 Mar 2019 17:33
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://ieeexplo ... rnumber=1259536 (Publisher URL)
PURE Output Type: Article
Published Date: 2004-02
Authors: Allsop, Thomas D.P. (ORCID Profile 0000-0001-8905-9014)
Gillooly, Andrew M.
Mezentsev, Vladimir (ORCID Profile 0000-0002-8415-1767)
Earthgrowl-Gould, T.
Neal, Ron
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Bennion, Ian



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